Zobrazeno 1 - 10
of 96
pro vyhledávání: '"Mark Van Raamsdonk"'
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 11, Pp 1-29 (2023)
Abstract Gravitational effective theories associated with holographic CFTs have cosmological solutions, which are typically big-bang/big-crunch cosmologies. These solutions are not asymptotically AdS, so they are not dual to finite-energy states of t
Externí odkaz:
https://doaj.org/article/f0a004c1bb8d4750bdde541fe6c3b285
Autor:
Brian Swingle, Mark Van Raamsdonk
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 8, Pp 1-27 (2023)
Abstract Motivated by traversable wormhole constructions that require large amounts of negative energy, we explore constraints on the amount of negative energy that can be carried by a free Dirac field in a slab-shaped region between two parallel spa
Externí odkaz:
https://doaj.org/article/4b5973468b914798a6862265578dd509
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 5, Pp 1-29 (2023)
Abstract A large class of Λ < 0 cosmologies have big-bang/big crunch spacetimes with time-symmetric backgrounds and asymptotically AdS Euclidean continuations suggesting a possible holographic realization. We argue that these models generically have
Externí odkaz:
https://doaj.org/article/987f41ff55fa48af8c2e48b6707ef141
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 9, Pp 1-44 (2022)
Abstract A large class of flat big bang-big crunch cosmologies with negative cosmological constant are related by analytic continuation to asymptotically AdS traversable wormholes with planar cross section. In recent works ( arXiv:2102.05057 , arXiv:
Externí odkaz:
https://doaj.org/article/cf376fcd919b47d4971b0e7774f4afa4
Autor:
Mark Van Raamsdonk
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 3, Pp 1-39 (2022)
Abstract We describe a class of holographic models that may describe the physics of certain four-dimensional big-bang/big-crunch cosmologies. The construction involves a pair of 3D Euclidean holographic CFTs each on a homogeneous and isotropic space
Externí odkaz:
https://doaj.org/article/097fe077cb04476eb71da27b77b14188
Autor:
Mark Van Raamsdonk
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 12, Pp 1-20 (2021)
Abstract Certain closed-universe big-bang/big-crunch cosmological spacetimes may be obtained by analytic continuation from asymptotically AdS Euclidean wormholes, as emphasized by Maldacena and Maoz. We investigate how these Euclidean wormhole spacet
Externí odkaz:
https://doaj.org/article/6b00036bdbcf4dc88e1b872348e11798
Autor:
Mark Van Raamsdonk, Chris Waddell
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 11, Pp 1-42 (2021)
Abstract We study solutions of type IIB string theory dual to N $$ \mathcal{N} $$ = 4 supersymmetric Yang-Mills theory on half of ℝ3,1 coupled to holographic three-dimensional superconformal field theories (SCFTs) at the edge of this half-space. Th
Externí odkaz:
https://doaj.org/article/79feb957565148a09a6c05601bb74860
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 8, Pp 1-24 (2021)
Abstract Using a holographic model, we study quantum field theories with a layer of one CFT surrounded by another CFT, on either a periodic or an infinite direction. We study the vacuum energy density in each CFT as a function of the central charges,
Externí odkaz:
https://doaj.org/article/32aa7449b44343399c826351043dfa8b
Autor:
Alex May, Mark Van Raamsdonk
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 4, Pp 1-37 (2021)
Abstract The recent paper [1] described how states of a holographic CFT can be approximated by states of a large collection of non-interacting BCFTs, such that the dual of the new system accurately approximates an arbitrarily large causal patch of th
Externí odkaz:
https://doaj.org/article/8527eb10314f4b6191ffbacd5013f6fd
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 3, Pp 1-45 (2021)
Abstract In this note, we consider entanglement and Renyi entropies for spatial subsystems of a boundary conformal field theory (BCFT) or of a CFT in a state constructed using a Euclidean BCFT path integral. Holographic calculations suggest that thes
Externí odkaz:
https://doaj.org/article/c4bbcd1c8dd44ce58e317cfec46d7459