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pro vyhledávání: '"Steven B. Giddings"'
Autor:
Steven B. Giddings
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 8, Pp 1-10 (2022)
Abstract A longstanding question in quantum gravity regards the localization of quantum information; one way to formulate this question is to ask how subsystems can be defined in quantum-gravitational systems. The gauge symmetry and necessity of solv
Externí odkaz:
https://doaj.org/article/880ab9004887436c8d2c176f311a489c
Autor:
Steven B. Giddings
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 12, Pp 1-42 (2021)
Abstract This paper systematically treats the evolving quantum state for two-dimensional black holes, with particular focus on the CGHS model, but also elucidating features generalizing to higher dimensions. This is done in Schrödinger picture(s), t
Externí odkaz:
https://doaj.org/article/6636c7f9a68e4079a7b38dee1a86d963
Autor:
Steven B. Giddings
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 11, Pp 1-17 (2020)
Abstract If holography is an equivalence between quantum theories, one might expect it to be described by a map that is a bijective isometry between bulk and boundary Hilbert spaces, preserving the hamiltonian and symmetries. Holography has been beli
Externí odkaz:
https://doaj.org/article/350fa73cec3d4c05960afb3d6ff891cb
Autor:
Steven B. Giddings, Gustavo J. Turiaci
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 9, Pp 1-18 (2020)
Abstract We investigate contributions of spacetime wormholes, describing baby universe emission and absorption, to calculations of entropies and correlation functions, for example those based on the replica method. We find that the rules of the “wo
Externí odkaz:
https://doaj.org/article/055b267f2af5422fa9b7d07b72c952bf
Autor:
Steven B. Giddings
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 10, Pp 1-11 (2019)
Abstract An interesting question is to characterize the general class of allowed boundary conditions for gauge theories, including gravity, at spatial and null infinity. This has played a role in discussions of soft charges, where antipodal symmetry
Externí odkaz:
https://doaj.org/article/d60868dc6dad44ed81366c7c147e1897
Autor:
Steven B. Giddings, Alex Kinsella
Publikováno v:
Journal of High Energy Physics, Vol 2018, Iss 11, Pp 1-24 (2018)
Abstract This paper explores construction of gauge (diffeomorphism)-invariant observables in anti de Sitter (AdS) space and the related question of how to find a “holographic map” providing a quantum equivalence to a boundary theory. Observables
Externí odkaz:
https://doaj.org/article/007d6d799fb141a49bc06f2e1aedbd34
Autor:
Steven B. Giddings
Publikováno v:
Journal of High Energy Physics, Vol 2017, Iss 12, Pp 1-27 (2017)
Abstract A first-principles approach to the unitarity problem for black holes is systematically explored, based on the postulates of 1) quantum mechanics 2) the ability to approximately locally divide quantum gravitational systems into subsystems 3)
Externí odkaz:
https://doaj.org/article/312b802c3425429fa92c2c2477c653a0
Autor:
Steven B. Giddings
Publikováno v:
Galaxies, Vol 9, Iss 1, p 16 (2021)
Bringing gravity into a quantum-mechanical framework is likely the most profound remaining problem in fundamental physics. The “unitarity crisis” for black hole evolution appears to be a key facet of this problem, whose resolution will provide im
Externí odkaz:
https://doaj.org/article/84684d6b82d24c8f841b42346dfa9888
Autor:
Steven B. Giddings
Publikováno v:
Physics Letters B, Vol 754, Iss C, Pp 39-42 (2016)
Where does Hawking radiation originate? A common picture is that it arises from excitations very near or at the horizon, and this viewpoint has supported the “firewall” argument and arguments for a key role for the UV-dependent entanglement entro
Externí odkaz:
https://doaj.org/article/394c214e776e4443a9a1ff6ae8cf5f95
Autor:
Steven B. Giddings
Publikováno v:
Physics Letters B, Vol 738, Iss , Pp 92-96 (2014)
Unitarization of black hole evaporation requires that quantum information escapes a black hole; an important question is to identify the mechanism or channel by which it does so. Accurate counting of black hole states via the Bekenstein–Hawking ent
Externí odkaz:
https://doaj.org/article/9a2ebbc04a824ea69a1c7e0221d34ed3