Quantum Physics (quant-ph new, recent, find)
General Relativity and Quantum Cosmology
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, Gravitational Radiation (2000)
abstract: ... in most astronomical systems. In common with all other phenomena, gravity must obey the principles of special relativity. In particular, gravitational forces must not be transmitted or communicated faster than light. ...
http://arxiv.org/abs/gr-qc/0003069
Gravitational Radiation
Bernard F Schutz
(Submitted on 16 Mar 2000)
Gravity is one of the fundamental forces of Nature, and it is the dominant force in most astronomical systems. In common with all other phenomena, gravity must obey the principles of special relativity. In particular, gravitational forces must not be transmitted or communicated faster than light. This means that when the gravitational field of an object changes, the changes ripple outwards through space and take a finite time to reach other objects. These ripples are called gravitational radiation or gravitational waves. This article gives a brief introduction to the physics of gravitational radiation, including technical material suitable for non-specialist scientists.
Top matches in this document to your query 'General Relativity and Quantum Cosmology 21st Century'
abstract: ... of the fundamental forces of Nature, and it is the dominant force in most astronomical systems. In common with all other phenomena, gravity must obey the principles of special relativity. In particular, gravitational forces must not be transmitted or communicated faster than light. This means that when the gravitational field of an object changes, the changes ...
Comments: Encyclopedia article, 2 figures, 14 pages. Accepted by Encycopedia of Astronomy and Astrophysics
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Subjects: General Relativity and Quantum Cosmology (gr-qc)DOI: l 10.1888/0333750888/2110
Report number: AEI-2000-020
Cite as: arXiv:gr-qc/0003069v1
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, Cosmology: Techniques and Observations (2004)
abstract: ... tools and observational evidence which conform modern cosmology. The aim is also to try to complement the many excellent ... and lack of space, some fundamental issues, as inflation, quantum gravity and string theoretical fundamental approaches to cosmology will not be dealt with here. A mini ...
http://arxiv.org/abs/gr-qc/0409076
Cosmology: Techniques and Observations
Emilio Elizalde
(Submitted on 20 Sep 2004)
These lectures were addressed to nonspecialists willing to learn some basic facts, approaches, tools and observational evidence which conform modern cosmology. The aim is also to try to complement the many excellent treatises that exists on the subject (an exhaustive treatment being in any case impossible for lack of time, in the lectures, and of space here), instead of trying to cover everything in a telegraphic way. We start by recalling in the introduction a couple of philosophical questions that have always upset inquiring minds. We then present some original mathematical approaches to investigate a number of basic questions, as the comparison of two point distributions (each point corresponding to a galaxy or galaxy cluster), the use of non-standard statistics in the analysis of possible non-Gaussianities, and the use of zeta regularization in the study of the contributions of vacuum energy effects at the cosmological scale. And we also summarize a number of important issues which are both undoubtedly beautiful (from the physical viewpoint) and useful in present-day observational cosmology. To finish, the reader should be warned that, for the reasons already given and lack of space, some fundamental issues, as inflation, quantum gravity and string theoretical fundamental approaches to cosmology will not be dealt with here. A minimal treatment of any of them would consume more pages than the ones at disposal and, again, a number of excellent treatments of these subjects are available.
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... II International Conference on Fundamental Interactions Pedra Azul, Brazil, June 2004 COSMOLOGY: TECHNIQUES AND OBSERVATIONS? Emilio Elizalde? Department of Mathematics, Massachusetts ... for the reasons already given and lack of space, some fundamental issues, as inflation, quantum gravity and string theoretical fundamental ap- proaches to cosmology will not be dealt wi ... abstract: ... some basic facts, approaches, tools and observational evidence which conform modern cosmology. The aim is also to try to complement the many excellent treatises that exists on the ... for the reasons already given and lack of space, some fundamental issues, as inflation, quantum gravity and string theoretical fundamental approaches to cosmology will not be dealt with here. A minimal treatment of any of them would consume more pages ...
Comments: 64 pages, 12 figures, lectures
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Subjects: General Relativity and Quantum Cosmology (gr-qc); Astrophysics (astro-ph); High Energy Physics - Theory (hep-th)Cite as: arXiv:gr-qc/0409076v1
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, A New Scientific Revolution at the Horizon? (2011)
abstract: At this beginning of the 21st century, the situation of physics is not without analogy with that ... with the outset of the double scientific revolution of relativity ... theory of light led to the operational beginning of quantum physics, the unexpected discovery of bonds between thermodynamics a ...
http://arxiv.org/abs/1101.1216
Gilles Cohen-Tannoudji, Sylvain Hudlet
(Submitted on 6 Jan 2011)
At this beginning of the 21st century, the situation of physics is not without analogy with that which prevailed a hundred years ago, with the outset of the double scientific revolution of relativity and quanta. On the one hand, recent progress of observational cosmology makes think that one has discovered a new universal constant, perhaps as fundamental as the velocity of light or the Planck's constant, the cosmological constant, which could explain the acceleration of the expansion of the universe. On the other hand, just like the efforts of Planck and Einstein to reconcile thermodynamics and the electromagnetic theory of light led to the operational beginning of quantum physics, the unexpected discovery of bonds between thermodynamics and general relativity makes to foresee new concepts, perhaps heralding a new scientific revolution, like that of holography and leads to consider a "thermodynamic route towards quantum cosmology." We will discuss the possible implications of these observational and theoretical developments.
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... Curie, BP 2060, 10010 Troyes Cedex Abstract At this beginning of the 21 st century, the situation of physics is not ... and the electromagnetic theory of light led to the operational beginning of quantum physics, the unexpected discovery of bonds between thermodynamics and general relativity makes to foresee new concepts, perhaps heralding a new scientific revolution, ... abstract: At this beginning of the 21st century, the situation of physics is not without analogy with that which prevailed a hundred years ago, with the outset of the double scientific revolution of relativity and quanta. On the one hand, recent progress of observational cosmology makes think that one has discovered a new universal constant, perhaps as fundamental as ...
Comments: The present article is an English translation of the talk given by G. G-T at the conference L'Univers invisible held in Paris (June 27th - July 13th 2009) to be published in the proceedings (Hermann editor)
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Subjects: History and Philosophy of Physics (physics.hist-ph); General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Theory (hep-th)Cite as: arXiv:1101.1216v1 [physics.hist-ph]
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, Quantum Mechanics, Gravity, and the Multiverse (2012)
abstract: ... string theory and eternal inflation. I then describe how quantum mechanics plays a crucial role in understanding the multive ... multiverse with the many worlds interpretation of quantum mechanics. The picture also provides a solution to a long-s ...
http://arxiv.org/abs/1205.2675
Yasunori Nomura
(Submitted on 11 May 2012)
The discovery of accelerating expansion of the universe has led us to take the dramatic view that our universe may be one of the many universes in which low energy physical laws take different forms: the multiverse. I explain why/how this view is supported both observationally and theoretically, especially by string theory and eternal inflation. I then describe how quantum mechanics plays a crucial role in understanding the multiverse, even at the largest distance scales. The resulting picture leads to a revolutionary change of our view of spacetime and gravity, and completely unifies the paradigm of the eternally inflating multiverse with the many worlds interpretation of quantum mechanics. The picture also provides a solution to a long-standing problem in eternal inflation, called the measure problem, which I briefly describe.
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UCB-PTH-12/04 Quantum Mechanics, Gravity, and the Multiverse Yasunori Nomura Berkeley Center for Theoretical ... etc). If we look at the structure of the theory of elementary particle physics and cosmology, however, there are also many ?miracles? that seem to be too good for our own existence; ... ?reference frame dependent? [11], precisely analogous to that of simultaneity in special relativity. 2 Predictivity Crisis in Eternal Inflation ... abstract: ... theoretically, especially by string theory and eternal inflation. I then describe how quantum mechanics plays a crucial role in understanding the multiverse, even at ... paradigm of the eternally inflating multiverse with the many worlds interpretation of quantum mechanics. The picture also provides a solution to a long-standing problem in eternal inf ...
Comments: 18 pages, 6 figures. An article published in the Astronomical Review, based on talks given by the author at various institutions
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Subjects: High Energy Physics - Theory (hep-th); Cosmology and Extragalactic Astrophysics (astro-ph.CO); General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Phenomenology (hep-ph); Quantum Physics (quant-ph)Journal reference: AstRv. 7, 36 (2012)
Report number: UCB-PTH-12/04
Cite as: arXiv:1205.2675v1 [hep-th]
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, Is There Unification in the 21st Century? (2010)
Is There Unification in the 21st Century ? Yuan K. Ha Department of Physics, Temple ... are gauge theories based on various Lie groups: 1. Quantum Electrodynamics - U (1). 2. Quantum Electroweak Theory - SU (2) × U (1). 3. Quantum Chromodynamics - SU (3). 4. Classical General Relativity - SO(3, ...
http://arxiv.org/abs/1007.2873
Yuan K. Ha
(Submitted on 16 Jul 2010)
In the last 100 years, the most important equations in physics are Maxwell's equations for electrodynamics, Einstein's equation for gravity, Dirac's equation for the electron and Yang-Mills equation for elementary particles. Do these equations follow a common principle and come from a single theory? Despite intensive efforts to unify gravity and the particle interactions in the last 30 years, the goal is still to be achieved. Recent theories have not answered any question in physics. We examine the issues involved in this long quest to understand the ultimate nature of spacetime and matter.
Top matches in this document to your query 'General Relativity and Quantum Cosmology 21st Century'Comments: Lecture delievered in Conference in Honor of Murray Gell-Mann's 80th Birthday. February 24 - 26, 2010. Nanyang Executive Centre, Singapore. 10 pages
Is There Unification in the 21st Century ? Yuan K. Ha Department of Physics, Temple University Philadelphia, Pennsylvania 19122 ... for the fundamental interactions are gauge theories based on various Lie groups: 1. Quantum Electrodynamics - U (1). 2. Quantum Electroweak Theory - SU (2) × U (1). 3. Quantum Chromodynamics - SU (3). 4. Classical General Relativity - SO(3, 1). The goal of unification is not simply to combine the various fundame ...
Subjects: General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Phenomenology (hep-ph); High Energy Physics - Theory (hep-th)
Journal reference: Proceedings of the Conference in Honour of Murray Gell-Mann's 80th Birthday, page 496 - 502 (World Scientific 2011)
Cite as: arXiv:1007.2873v1 [gr-qc]
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, The Quest for Quantum Gravity (1995)
abstract: ... in reconciling Einstein's classical theory of gravity - general relativity - with quantum field theory. Although both theories have been ... the Ashtekar program, and addresses the problem of time in quantum gravity. It contains interviews with Abhay Ashtekar, Chris ...
http://arxiv.org/abs/gr-qc/9506001
G. Au
(Submitted on 2 Jun 1995)
One of the greatest challenges facing theoretical physics lies in reconciling Einstein's classical theory of gravity - general relativity - with quantum field theory. Although both theories have been experimentally supported in their respective regimes, they seem mutually incompatible. This article summarises the current status of the superstring approach to the problem, the status of the Ashtekar program, and addresses the problem of time in quantum gravity. It contains interviews with Abhay Ashtekar, Chris Isham, and Edward Witten.
Top matches in this document to your query 'General Relativity and Quantum Cosmology 21st Century'18pp., LaTeX
... arXiv:gr-qc/9506001v1 2 Jun 1995 UM-P-95/24 gr-qc/9506001 June 1995 The Quest for Quantum Gravity Gary K. Au Research Centre for High Energy Physics School of Physics The ... facing theoretical physics lies in reconciling Einstein's classical theory of gravity - general relativity - with quantum field theory. Although both theories have been experimentally supported in ... abstract: ... facing theoretical physics lies in reconciling Einstein's classical theory of gravity - general relativity - with quantum field theory. Although both theories have been experimentally supported in their ... to the problem, the status of the Ashtekar program, and addresses the problem of time in quantum gravity. It contains interviews with Abhay Ashtekar, Chris Isham, and Edward Witten.
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, Cosmology at the Millennium (1999)
abstract: ... seen today. A paradigm based upon deep connections between cosmology and elementary particle physics -- inflation + cold dark ma ... of the forces and particles of nature. As we enter the 21st century, a flood of observations is testing this paradigm.
http://arxiv.org/abs/astro-ph/9901113
, Quantum Cosmology: Problems for the 21st Century (1997)
abstract: ... law and (2) a law for the cosmological initial condition. Quantum cosmology is the area of basic research concerned with the ... are presented in the form of eight problems. (To appear in Physics 2001, ed. by M. Kumar and in the Proceedings of the 10th Yu ...
http://arxiv.org/abs/gr-qc/9701022
James B. Hartle (Institute for Theoretical Physics, University of California, Santa Barbara)
(Submitted on 11 Jan 1997 (v1), last revised 16 Jan 1997 (this version, v2))
Two fundamental laws are needed for prediction in the universe: (1) a basic dynamical law and (2) a law for the cosmological initial condition. Quantum cosmology is the area of basic research concerned with the search for a theory of the initial cosmological state. The issues involved in this search are presented in the form of eight problems. (To appear in Physics 2001, ed. by M. Kumar and in the Proceedings of the 10th Yukawa-Nishinomiya Symposium}, November 7-8, 1996, Nishinomiya, Japan.)
Top matches in this document to your query 'Quantum Physics in the 21st century'18pages, uses REVTEX 3.0, one embedded ps figure, corrected reference
arXiv:gr-qc/9701022v2 16 Jan 1997 NSF-ITP-96-141, UCSBTH-96-26 Quantum Cosmology: Problems for the 21 st Century James B. Hartle (February 15, 2009) Abstract Two fundamental laws are needed for ... involved in this search are presented in the form of eight problems. To appear in Physics 2001, ed. by M. Kumar and in the Proceedings of the 10 th Yukawa- Nishinomiya Symposium , ... abstract: ... (1) a basic dynamical law and (2) a law for the cosmological initial condition. Quantum cosmology is the area of basic research concerned with the search for a theory of the ... involved in this search are presented in the form of eight problems. (To appear in Physics 2001, ed. by M. Kumar and in the Proceedings of the 10th Yukawa-Nishinomiya Symposium}, N ...
in Proceedings of the 11th Nishinomiya-Yukawa Symposium, ed by K. Kikkawa, H. Kunitomo, and H. Ohtsubo, World Scientific Singapore, 1998
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, Quantum Cosmology: Problems for the 21st Century (1997)
abstract: ... needed for prediction in the universe: (1) a basic dynamical law and (2) a law for the cosmological initial condition. Quantum cosmology is the area of basic research concerned with the search for a theory of the initial cosmological state. The issues ...
http://arxiv.org/abs/gr-qc/9701022
James B. Hartle (Institute for Theoretical Physics, University of California, Santa Barbara)
(Submitted on 11 Jan 1997 (v1), last revised 16 Jan 1997 (this version, v2))
Two fundamental laws are needed for prediction in the universe: (1) a basic dynamical law and (2) a law for the cosmological initial condition. Quantum cosmology is the area of basic research concerned with the search for a theory of the initial cosmological state. The issues involved in this search are presented in the form of eight problems. (To appear in Physics 2001, ed. by M. Kumar and in the Proceedings of the 10th Yukawa-Nishinomiya Symposium}, November 7-8, 1996, Nishinomiya, Japan.)
Top matches in this document to your query 'General Relativity and Quantum Cosmology 21st Century'18pages, uses REVTEX 3.0, one embedded ps figure, corrected reference
arXiv:gr-qc/9701022v2 16 Jan 1997 NSF-ITP-96-141, UCSBTH-96-26 Quantum Cosmology: Problems for the 21 st Century James B. Hartle (February 15, 2009) Abstract Two fundamental laws are needed for ... that predicted regularities in time. The laws of Newtonian mechanics, electrodynamics, general relativity, and quantum theory all have this character. The Schrodinger equation is an example of fu ... abstract: Two fundamental laws are needed for prediction in the universe: (1) a basic dynamical law and (2) a law for the cosmological initial condition. Quantum cosmology is the area of basic research concerned with the search for a theory of the initial cosmological state. The issues involved in this search are presented in the form of eight ...
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, The mystical formula and the mystery of Khronos (2008)
abstract: ... formulation proposed by Minkowski made its generalization to curved spaces quite natural, leaving the doors to the General Theory of Relativity and many other developments ajar. Nevertheless, it is remarkable that this deceptively simple formulation eluded many ...
http://arxiv.org/abs/0801.3994
Orfeu Bertolami
(Submitted on 25 Jan 2008 (v1), last revised 2 Dec 2009 (this version, v3))
In 1908, Minkowski put forward the idea that invariance under what we call today the Lorentz group, $GL(1,3, {\bf R})$, would be more meaningful in a four-dimensional space-time continuum. This suggestion implies that space and time are intertwined entities so that, kinematic and dynamical quantities can be expressed as vectors, or more generally by tensors, in the four-dimensional space-time. Minkowski also showed how causality should be structured in the four-dimensional vector space. The mathematical formulation proposed by Minkowski made its generalization to curved spaces quite natural, leaving the doors to the General Theory of Relativity and many other developments ajar.
Nevertheless, it is remarkable that this deceptively simple formulation eluded many researchers of space and time, and goes against our every day experience and perception, according to which space and time are distinct entities. In this contribution, we discuss these contradictory views, analyze how they are seen in contemporary physics and comment on the challenges that space-time explorers face.
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... made its generalization to curved spaces quite natural, leaving the doors to the General Theory of Relativity and many other developments a jar. Nevertheless, it is remarkable that this deceptively s ... on the challenges that space-time explorers face. 1 The mystical formula On the 21st of September 1908, at his address to the 80th Assembly of German Natural Scientists and P ... abstract: ... in the four-dimensional vector space. The mathematical formulation proposed by Minkowski made its generalization to curved spaces quite natural, leaving the doors to the General Theory of Relativity and many other developments ajar. Nevertheless, it is remarkable that this deceptively simple formulation eluded many researchers of space and time, and goes against our every d ...
Comments: 27 pages. Contribution to appear the volume "Minkowski Spacetime: A Hundred Years Later" to be published by Springer in the series "Fundamental Theories of Physics", V. Petkov, Ed. Typos corrected
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Subjects: General Relativity and Quantum Cosmology (gr-qc); History and Philosophy of Physics (physics.hist-ph); Quantum Physics (quant-ph)Cite as: arXiv:0801.3994v3 [gr-qc]
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, Quantum cosmology for the 21st century: A debate (2010)
http://arxiv.org/abs/1005.2471
(Submitted on 14 May 2010)
Quantum cosmology for the 21st century: A debate
Quantum cosmology from the late sixties into the early twenty-first century is reviewed and appraised in the form of a debate, set up by two presentations on mainly the Wheeler-DeWitt quantization and on loop quantum cosmology, respectively. (Open) questions, encouragement and guiding lines shared with the audience are provided here.
... - Proceedings Trim Size: 9.75in x 6.5in debatefinal 1 Quantum Cosmology for the XXIst Century: A Debate Martin Bo jowald1 The Pennsylvania State University, Institute for ... 3 pmoniz@ubi.pt Quantum cosmology from the late sixties into the early XXIst century is reviewed and appraised in the form of a debate, set up by two presentations on mainly ... abstract: Quantum cosmology from the late sixties into the early twenty-first century is reviewed and appraised in the form of a debate, set up by two presentations on mainly the Wheeler-DeWitt quantization and on loop quantum cosmology, respectively. (Open) ...
Download: PDF- PostScript - Other formats - - -Quantum cosmology for the 21st century: A debate
Quantum cosmology from the late sixties into the early twenty-first century is reviewed and appraised in the form of a debate, set up by two presentations on mainly the Wheeler-DeWitt quantization and on loop quantum cosmology, respectively. (Open) questions, encouragement and guiding lines shared with the audience are provided here.
... - Proceedings Trim Size: 9.75in x 6.5in debatefinal 1 Quantum Cosmology for the XXIst Century: A Debate Martin Bo jowald1 The Pennsylvania State University, Institute for ... 3 pmoniz@ubi.pt Quantum cosmology from the late sixties into the early XXIst century is reviewed and appraised in the form of a debate, set up by two presentations on mainly ... abstract: Quantum cosmology from the late sixties into the early twenty-first century is reviewed and appraised in the form of a debate, set up by two presentations on mainly the Wheeler-DeWitt quantization and on loop quantum cosmology, respectively. (Open) ...
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, Conceptual issues in quantum cosmology (1999)
abstract: ... review of the conceptual issues that arise in theories of quantum cosmology. I start by emphasising some features of ordinary quantum theory that also play a crucial role in understanding quantum cosmology. I then give motivations why spacetime cannot be treated classically at the most ...
http://arxiv.org/abs/gr-qc/9906100
Claus Kiefer
(Submitted on 24 Jun 1999)
I give a review of the conceptual issues that arise in theories of quantum cosmology. I start by emphasising some features of ordinary quantum theory that also play a crucial role in understanding quantum cosmology. I then give motivations why spacetime cannot be treated classically at the most fundamental level. Two important issues in quantum cosmology -- the problem of time and the role of boundary conditions -- are discussed at some length. Finally, I discuss how classical spacetime can be recovered as an approximate notion. This involves the application of a semiclassical approximation and the process of decoherence. The latter is applied to both global degrees of freedom and primordial fluctuations in an inflationary Universe.
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Conceptual issues in quantum cosmology? Claus Kiefer1,2 1 Fakultat fur Physik, Universitat Freiburg, Hermann-Herder-Str. ... of processes such as inflation. The presence of the singularity theorems in general relativity prevents the formulation of viable initial conditions in the classical theory. Moreover, ... Phys. Today 51 (July), 36?42 22. Hartle, J.B. (1997): Quantum cosmology: problems for the 21st century. In: Physics in the 21st cen ... abstract: I give a review of the conceptual issues that arise in theories of quantum cosmology. I start by emphasising some features of ordinary quantum theory that also play a crucial role in understanding quantum cosmology. I then give motivations why spacetime cannot be treated classically at the most fundamental level. Two important issues in quantum cosmology -- the problem of time and the role of boundary conditions -- are discussed at some ...
Comments: 31 pages, LATEX, needs Springer macro cl2emult.cls, 3 eps-figures, contribution for the Karpacz winter school 1999
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Subjects: General Relativity and Quantum Cosmology (gr-qc)
Journal reference: Lect.Notes Phys. 541 (2000) 158-187
Report number: Freiburg THEP-99/7
Cite as: arXiv:gr-qc/9906100v1
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, Quantum theory's last challenge (2000)
abstract: Quantum mechanics is now 100 years old and still going strong. Combining general relativity with quantum mechanics is the last hurdle to be overcome in the "quantum ...
http://arxiv.org/abs/gr-qc/0012049
Giovanni Amelino-Camelia
(Submitted on 14 Dec 2000)
Quantum mechanics is now 100 years old and still going strong. Combining general relativity with quantum mechanics is the last hurdle to be overcome in the "quantum revolution".
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gr-qc/0012049 Nature 408 (2000) 661-664 Quantum theory?s last challenge1 Giovanni AMELINO-CAMELIA Dipartimento di Fisica, Universit`a ... mechanics is now 100 years old and still going strong. Combining general relativity with quantum ... quantum concepts to understand the structure of all matter and radiation. Over the past century there have been many successful tests of quantum mechan- ics (see accompanying commentary ... abstract: Quantum mechanics is now 100 years old and still going strong. Combining general relativity with quantum mechanics is the last hurdle to be overcome in the "quantum ...
Comments: (9 pages, LaTex) This is the preprint version of an article that appeared in the issue 6813 (volume 408) of Nature, as part of a 3-article celebration of the 100th anniversary of Planck's solution of the black-body-radiation problem
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Subjects: General Relativity and Quantum Cosmology (gr-qc); Astrophysics (astro-ph); High Energy Physics - Phenomenology (hep-ph); High Energy Physics - Theory (hep-th)
Journal reference: Nature 408 (2000) 661-664
Cite as: arXiv:gr-qc/0012049v1
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, Conceptual tensions between quantum mechanics and general relativity: Are there experimental consequences? (2003)
abstract: One of the conceptual tensions between quantum mechanics (QM) and general relativity (GR) arises from the clash between the spatial ... will be discussed for macroscopically entangled, coherent quantum fluids, such as superconductors, superfluids, atomic Bose-Einstein condensates, and quantum Hall ...
http://arxiv.org/abs/gr-qc/0303100
R. Y. Chiao
(Submitted on 25 Mar 2003 (v1), last revised 7 Apr 2003 (this version, v2))
One of the conceptual tensions between quantum mechanics (QM) and general relativity (GR) arises from the clash between the spatial nonseparability of entangled states in QM, and the complete spatial separability of all physical systems in GR, i.e., between the nonlocality implied by the superposition principle, and the locality implied by the equivalence principle. Possible experimental consequences of this conceptual tension will be discussed for macroscopically entangled, coherent quantum fluids, such as superconductors, superfluids, atomic Bose-Einstein condensates, and quantum Hall fluids, interacting with tidal and gravitational radiation fields. A minimal-coupling rule, which arises from the electron spin coupled to curved spacetime, leads to an interaction between electromagnetic (EM) and gravitational (GR) radiation fields mediated by a quantum Hall fluid. This suggests the possibility of a quantum transducer action, in which EM waves are convertible to GR waves, and vice versa.
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Conceptual tensions between quantum mechanics and general relativity: Are there experimental consequences? Version for CUP 04-07-03 Raymond Y. ... I see it, the three main pillars of physics at the beginning of the 21st century are quan- tum mechanics, relativity, and statistical mechanics, which correspond to Eins ... A. Herdegen and J. Wawrzycki, Phys. Rev. D 66, 044007 (2002). [31] S. Weinberg, Gravitation and Cosmology: Principles and ... abstract: One of the conceptual tensions between quantum mechanics (QM) and general relativity (GR) arises from the clash between the spatial nonseparability of entangled states in QM, ... of this conceptual tension will be discussed for macroscopically entangled, coherent quantum fluids, such as superconductors, superfluids, atomic Bose-Einstein condensates, and quantum Hall fluids, interacting with tidal and gravitational radiation fields. A minimal-cou ...
Comments: 37 pages, 4 figures, for Wheeler's 90th Birthday Symposium Proceedings, to be published by Cambridge University Press
Subjects: General Relativity and Quantum Cosmology (gr-qc)
Report number: UCB-phys-03-25-03
Cite as: arXiv:gr-qc/0303100v2
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, Conceptual tensions between quantum mechanics and general relativity: Are there experimental consequences, e.g., superconducting transducers between electromagnetic and gravitational radiation? (2002)
abstract: One of the conceptual tensions between quantum mechanics (QM) and general relativity (GR) arises from the clash between the spatial ... tension will be explored for macroscopically coherent quantum fluids, such as superconductors, superfluids, and atomic Bo ...
http://arxiv.org/abs/gr-qc/0208024
Raymond Y. Chiao
(Submitted on 9 Aug 2002 (v1), last revised 18 Sep 2002 (this version, v3))
One of the conceptual tensions between quantum mechanics (QM) and general relativity (GR) arises from the clash between the spatial nonseparability of entangled states in QM, and the complete spatial separability of all physical systems in GR, i.e., between the nonlocality implied by the superposition principle, and the locality implied by the equivalence principle. Experimental consequences of this conceptual tension will be explored for macroscopically coherent quantum fluids, such as superconductors, superfluids, and atomic Bose-Einstein condensates (BECs), subjected to tidal and Lense-Thirring fields arising from gravitational radiation. A Meissner-like effect is predicted, in which the Lense-Thirring field is expelled from the bulk of a quantum fluid. Superconductors are predicted to be macroscopic quantum gravitational antennas and transducers, which can directly convert upon reflection a beam of quadrupolar electromagnetic radiation into gravitational radiation, and vice versa, and thus serve as both sources and receivers of gravitational waves. An estimate of the transducer conversion efficiency on the order of unity comes out of the Ginzburg-Landau theory for an extreme type II, dissipationless superconductor with minimal coupling to weak gravitational and electromagnetic radiation fields, whose frequency is smaller than the BCS gap frequency, thus satisfying the quantum adiabatic theorem. The concept of ``the impedance of free space for gravitational plane waves'' is introduced, and leads to a natural impedance-matching process, in which the two kinds of radiation fields are impedance-matched to each other around a hundred coherence lengths beneath the surface of the superconductor. A simple, Hertz-like experiment has been performed to test these ideas, and preliminary results will be reported.
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arXiv:gr-qc/0208024v3 18 Sep 2002 Conceptual tensions between quantum mechanics and general relativity: Are there experimental consequences, e.g., superconducting transducers between ... in QM. As I see it, the three main pillars of physics at the beginning of the 21st century are quantum mechanics, relativity, and statistical mechanics, which correspond to Einstei ... abstract: One of the conceptual tensions between quantum mechanics (QM) and general relativity (GR) arises from the clash between the spatial nonseparability of entangled states in QM, ... of this conceptual tension will be explored for macroscopically coherent quantum fluids, such as superconductors, superfluids, and atomic Bose-Einstein condensates (BECs) ... effect is predicted, in which the Lense-Thirring field is expelled from the bulk of a quantum ...
Comments: 54 pages, 4 figures, Wheeler Symposium/Chapter
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Subjects: General Relativity and Quantum Cosmology (gr-qc)
Cite as: arXiv:gr-qc/0208024v3
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, Introduction to Modern Canonical Quantum General Relativity (2001)
abstract: ... the by now fifteen years old research field of canonical quantum general relativity, sometimes called "loop quantum gravity". The term "modern" in the title refers to the fact that the quantum theory is based on formulating classical general relativity as a theory of ...
http://arxiv.org/abs/gr-qc/0110034
Thomas Thiemann
(Submitted on 5 Oct 2001)
This is an introduction to the by now fifteen years old research field of canonical quantum general relativity, sometimes called "loop quantum gravity". The term "modern" in the title refers to the fact that the quantum theory is based on formulating classical general relativity as a theory of connections rather than metrics as compared to in original version due to Arnowitt, Deser and Misner. Canonical quantum general relativity is an attempt to define a mathematically rigorous, non-perturbative, background independent theory of Lorentzian quantum gravity in four spacetime dimensions in the continuum. The approach is minimal in that one simply analyzes the logical consequences of combining the principles of general relativity with the principles of quantum mechanics. The requirement to preserve background independence has lead to new, fascinating mathematical structures which one does not see in perturbative approaches, e.g. a fundamental discreteness of spacetime seems to be a prediction of the theory providing a first substantial evidence for a theory in which the gravitational field acts as a natural UV cut-off. An effort has been made to provide a self-contained exposition of a restricted amount of material at the appropriate level of rigour which at the same time is accessible to graduate students with only basic knowledge of general relativity and quantum field theory on Minkowski space.
Top matches in this document to your query 'General Relativity and Quantum Cosmology 21st Century'301 pages, Latex; based in part on the author's Habilitation Thesis "Mathematische Formulierung der Quanten-Einstein-Gleichungen", University of Potsdam, Potsdam, Germany, January 2000; submitted to the on-line journal Living Reviews; subject to being updated on at least a bi-annual basis
arXiv:gr-qc/0110034v1 5 Oct 2001 Introduction to Modern Canonical Quantum General Relativity T. Thiemann 1 MPI f. Gravitationsphysik, Albert-Einstein-Institut, Am Muhlenberg 1, 14476 ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Why Quantum Gravity in the 21st Century ? . . . . . . . . . . . . . . . . . . 10 The Role of Background Independence . . . . . . ... abstract: This is an introduction to the by now fifteen years old research field of canonical quantum general relativity, sometimes called "loop quantum gravity". The term "modern" in the title refers to the fact that the quantum theory is based on formulating classical general relativity as a theory of connections rather than metrics as compared to in original version due to Arnowitt, Deser and Misner. Canonical quantum general relativity is an attempt to ...
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, Special Relativity in the 21$^{\rm st}$ century (2008)
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http://arxiv.org/abs/0807.3009
(Submitted on 18 Jul 2008)
This paper, which is meant to be a tribute to Minkowski's geometrical insight, rests on the idea that the basic observed symmetries of spacetime homogeneity and of isotropy of space, which are displayed by the spacetime manifold in the limiting situation in which the effects of gravity can be neglected, leads to a formulation of special relativity based on the appearance of two universal constants: a limiting speed $c$ and a cosmological constant $\Lambda$ which measures a residual curvature of the universe, which is not ascribable to the distribution of matter-energy. That these constants should exist is an outcome of the underlying symmetries and is confirmed by experiments and observations, which furnish their actual values. Specifically, it turns out on these foundations that the kinematical group of special relativity is the de Sitter group $dS(c,\Lambda)=SO(1,4)$. On this basis, we develop at an elementary classical and, hopefully, sufficiently didactical level the main aspects of the theory of special relativity based on SO(1,4) (de Sitter relativity). As an application, we apply the formalism to an intrinsic formulation of point particle kinematics describing both inertial motion and particle collisions and decays.Top matches in this document to your query 'General Relativity 21st century'
Annalen der Physik, 17 December 2011 Special Relativity in the 21st century S. Cacciatori1, ? , V. Gorini1, ?? , and A. Kamenshchik2,3, ??? 1 Dipartimento di Fisica ... July 2008 by F. W. Hehl Published online XXXX Key words Minkowski, special relativity, general relativity, de Sitter group, Minkowski hyperboloid. PACS 03.30.+p, 04.20.Cv, 98.80.-k, 98.80.Jk We ... abstract: ... in which the effects of gravity can be neglected, leads to a formulation of special relativity based on the appearance of two universal constants: a limiting speed $c$ and a ... Specifically, it turns out on these foundations that the kinematical group of special relativity is the de Sitter group $dS(c,\Lambda)=SO(1,4)$. On this basis, we develop at an elementar
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, Exact Quantum Loop Results in the Theory of General Relativity (2006)
abstract: We present a new approach to quantum general relativity based on the idea of Feynman to treat the graviton in Einstein's theory as a point particle field subject to quantum fluctuations just as any such field is in the ...
http://arxiv.org/abs/hep-ph/0607198
B.F.L. Ward (1) ((1) Dept. of Physics, Baylor University, Waco, TX, USA)
(Submitted on 18 Jul 2006 (v1), last revised 11 May 2007 (this version, v5))
We present a new approach to quantum general relativity based on the idea of Feynman to treat the graviton in Einstein's theory as a point particle field subject to quantum fluctuations just as any such field is in the well-known Standard Model of the electroweak and strong interactions. We show that by using resummation techniques based on the extension of the methods of Yennie, Frautschi and Suura to Feynman's formulation of Einstein's theory, we get calculable loop corrections that are even free of UV divergences. One further by-product of our analysis is that we can apply it to a large class of interacting field theories, both renormalizable and non-renormalizable, to render their UV divergences finite as well. We illustrate our results with applications of some phenomenological interest.
Top matches in this document to your query 'General Relativity and Quantum Cosmology 21st Century'
Exact Quantum Loop Results in the Theory of General Relativity? BU-HEPP-05-07 July, 2006 B.F.L. Ward Department of Physics, Baylor University, Waco, ... theory of general relativity is one key piece of unfin- ished business left-over for the 21st century. At this writing, the only accepted complete treatment of quantum general relativity, sup ... K.S. Thorne and J.A. Wheeler, Gravitation,( Freeman, San Francisco, 1973 ). [2] S. Weinberg, Gr ... abstract: We present a new approach to quantum general relativity based on the idea of Feynman to treat the graviton in Einstein's theory as a point particle field subject to quantum fluctuations just as any such field is in the well-known Standard Model of the electroweak and strong interactions. We show that by using resummation techniques based on the ...
Comments: 26 pages, 3 figures; improved text; improved text;improved text; improved text to 31 pages, 4 figures
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Subjects: High Energy Physics - Phenomenology (hep-ph)
Journal reference: The Open Nucl. & Part. Phys. J. 2 (2009) 1-16
DOI: 10.2174/1874415X00902010001
Report number: BU-HEPP-05-07
Cite as: arXiv:hep-ph/0607198v5
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, Looking Back at the First Decade of 21st-Century High-Energy Physics (2002)
... 12 Aug 2002 LOOKING BACK AT THE FIRST DECADE OF 21ST-CENTURY HIGH-ENERGY PHYSICS JOHN ELLIS Theory Division, CERN, CH 1211 Geneva ... of charged-lepton flavour violation, the debut of quantum gravity phenomenology and the emergence of space-time from ...
http://arxiv.org/abs/hep-ph/0208109
... 12 Aug 2002 LOOKING BACK AT THE FIRST DECADE OF 21ST-CENTURY HIGH-ENERGY PHYSICS JOHN ELLIS Theory Division, CERN, CH 1211 Geneva ... of charged-lepton flavour violation, the debut of quantum gravity phenomenology and the emergence of space-time from ...
http://arxiv.org/abs/hep-ph/0208109
(Submitted on 12 Aug 2002)
On the occasion of the Tenth Conference on String Phenomenology in 2011, I review the dramatic progress since 2002 in experimental tests of fundamental theoretical ideas. These include the discovery of (probably fermionic) extra dimensions at the LHC, the discovery of dark matter particles, observations of charged-lepton flavour violation, the debut of quantum gravity phenomenology and the emergence of space-time from the string soup.
Top matches in this document to your query 'Quantum Physics in the 21st century'18 pages, 16 eps figures, uses ws-procs9x6.cls (included)
arXiv:hep-ph/0208109v1 12 Aug 2002 LOOKING BACK AT THE FIRST DECADE OF 21ST-CENTURY HIGH-ENERGY PHYSICS JOHN ELLIS Theory Division, CERN, CH 1211 Geneva 23, Switzerland E-mail: ... of dark matter particles, observations of charged-lepton flavour violation, the debut of quantum gravity phenomenology and the emergence of space-time from the string soup. CERN-TH/2002- ... abstract: ... include the discovery of (probably fermionic) extra dimensions at the LHC, the discovery of dark matter particles, observations of charged-lepton flavour violation, the debut of quantum gravity phenomenology and the emergence of space-time from the string ...
arXiv:hep-ph/0208109v1
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, Quantum information and physics: some future directions (1999)
abstract: I consider some promising future directions for quantum information theory that could influence the development of 21st century physics. Advances in the theory of the distinguishability of ... may lead to new strategies for improving the precision of quantum-limited measurements. A better grasp of ...
http://arxiv.org/abs/quant-ph/9904022
(Submitted on 6 Apr 1999 (v1), last revised 30 Apr 1999 (this version, v3))
I consider some promising future directions for quantum information theory that could influence the development of 21st century physics. Advances in the theory of the distinguishability of superoperators may lead to new strategies for improving the precision of quantum-limited measurements. A better grasp of the properties of multi-partite quantum entanglement may lead to deeper understanding of strongly-coupled dynamics in quantum many-body systems, quantum field theory, and quantum gravity.
Top matches in this document to your query 'Quantum Physics in the 21st century'Download:PDF
arXiv:quant-ph/9904022v3 30 Apr 1999 Quantum information and physics: some future directions John Preskill, Lauritsen Laboratory of High Energy ... abstract: I consider some promising future directions for quantum information theory that could influence the development of 21st century physics. Advances in the theory of the distinguishability of superoperators may lead to new strategies for improving the precision of quantum-limited measurements. A better grasp of the properties of multi-partite quantum entanglement may lead to deeper understanding of strongly-coupled dynamics in quantum many-body ...
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