2024 Hartle–hawking state

Hartle–hawking state

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August undefined, 2024

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WebRyu–Takayanagi conjecture. The Ryu–Takayanagi conjecture is a conjecture within holography that posits a quantitative relationship between the entanglement entropy of a conformal field theory and the geometry of an associated anti-de Sitter spacetime. [1] [2] The formula characterizes "holographic screens" in the bulk; that is, it specifies ... WebMar 6, 2024 · Figure 4. Reissner-Nordstrom black hole. The inner and outer horizons are shown as dashed lines. In the Hartle-Hawking state, the conditions of the singularity theorem can be satisfied if R is a large enough region near null infinity containing Hawking radiation and B the interior of the black hole containing the purification of the radiation. … gerard mccormack

arXiv:2304.04427v1 [hep-th] 10 Apr 2024

WebThe Hartle-Hawking model and Fred Hoyle's model of a steady state universe are two different theoretical models that were proposed to explain the origin and evolution of the universe. Here are some key … WebApr 14, 2024 · Abstract. The Hartle–Hawking wave function is known to be the Fourier dual of the Chern–Simons or Kodama state reduced to mini-superspace, using an integration contour covering the whole real line. But since the Chern–Simons state is a solution of the Hamiltonian constraint (with a given ordering), its Fourier dual should provide a ... WebDec 15, 1983 · The quantum state of a spatially closed universe can be described by a wave function which is a functional on the geometries of compact three-manifolds and on … gerard mccormick

A generalized Hartle–Hawking wave function - IOPscience

WebStephen Hawking has argued that the principles of quantum mechanics forbid a single cosmic history, and has proposed cosmological theories in which the lack of a past boundary condition naturally leads to multiple histories, called the 'no-boundary proposal', the proposed Hartle–Hawking state. According to Hawking and Thomas Hertog, "The top ... WebApr 13, 2024 · The spontaneous excitation of a two-level atom held static outside a four dimensional Schwarzschild black hole and in interaction with a massless scalar field in the Boulware, Unruh and Hartle-Hawking vacuum is investigated and the contributions of the vacuum fluctuations and radiation reaction to the rate of change of the mean atomic … gerard mcdearmonWebApr 15, 2009 · These results are used to justify the covariant boundary condition used in recent approaches of computing the Hawking flux from chiral gauge and gravitational anomalies. We also discuss a connection of our results with the conventional calculation of nonchiral currents and stress tensors in different (Unruh, Hartle-Hawking and Boulware) … christina m bryan

"WebWe study the Hawking radiation in the framework of open quantum systems by examining the time evolution of a detector (modelled by a two-level atom) interacting with vacuum massless scalar fields. The dynamics of the d… " - Hartle–hawking state

Hartle–hawking state

WebOct 18, 2015 · What confuse me is that what on earth is Hartle Hawking state and how can a path integral over finite imaginary time project out all the state other than vacuum? Wish somebody can give some reference related to Hartle Hawking state and give me some explanation on my confusion. quantum-field-theory; black-holes; WebOct 18, 2015 · What confuse me is that what on earth is Hartle Hawking state and how can a path integral over finite imaginary time project out all the state other than vacuum? …

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WebApr 11, 2024 · black hole in the Hartle-Hawking state [6,7]. From the fact that the time coordinate becomes dynamical on the boundary and the one-dimensional boundary action is given by the Schwarzian derivative [8], Engels oy, Mertens, and Verlinde [9] investigated the black hole in the Unruh state [10] allowing for the formation and evaporation process ... WebJan 1, 2024 · Related: Stephen Hawking's most far-out ideas about black holes Black holes from the beginning Dark matter makes up over 80% of all the matter in the universe, but it doesn't directly interact ...

The Hartle–Hawking state is the wave function of the Universe—a notion meant to figure out how the Universe started—that is calculated from Feynman's path integral. More precisely, it is a hypothetical vector in the Hilbert space of a theory of quantum gravity that describes this wave function. It is a … See more The Hartle–Hawking state is a proposal in theoretical physics concerning the state of the Universe prior to the Planck epoch. It is named after James Hartle and Stephen Hawking. Hartle and Hawking … See more • Imaginary time • Multiple histories • Signature change See more WebThe quantum state of a spatially closed universe can be described by a wave function which is a functional on the geometries of compact three-manifolds and on the values of the matter fields on these manifolds. ... {Wave Function of the Universe}, author={James B. Hartle and Stephen William Hawking}, journal={Physical Review D}, year={1983 ...

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Webplanation as to why the Universe began in a highly ordered state was put forth by Penrose in [2] based on the predictions of general relativity that singularities have ... posals of Hartle and Hawking who claim that the boundary condition of the Uni-verse is that it has no boundary [13], and the tunnelling boundary condition of ...

WebMar 4, 2024 · The Hartle-Hawking state represents a black hole in equilibrium with its surroundings (so it never evaporates), and the Boulware state doesn't look anything at all like empty space for observers falling through the horizon, as noted in the question. The abstract of Unruh's original paper says it this way: christina mcadams md paWebJan 15, 2008 · We find that the detector in both the Unruh and Hartle-Hawking vacua would spontaneously excite with a nonvanishing probability the same as what one would obtain if there is thermal radiation at the Hawking temperature from the black hole, thus reproducing the basic results concerning the Hawking effect in the framework of open quantum … christina mcalpin taylorWebthe following argument against the Hartle-Hawking no-boundary proposal for the quantum state of the universe: It should most likely lead to a nearly empty large de Sitter universe, rather than to early rapid inﬂation. Even if one adds the condition of observers, they are most likely to form by quantum gerard mcdermott qc twitterWebAug 8, 2024 · A more precise analogy would be with the Hartle-Hawking state in the Kruskal spacetime. $\endgroup$ – Valter Moretti. Aug 9, 2024 at 7:46 $\begingroup$ In the Kruskal manifold there are at least two quantum states with thermal properties. One is the HH state which is an equilibrium state, the other is the Unruh state which describes the ... gerard mccormick 8laWebThe Hartle-Hawking state implies the existence of multiple universes 3 , with different histories and geometries. Some of these universes were short-lived and collapsed again on themselves, while other will keep … gerard mccaugheyWebHartle-Hawking state Hartle-Hawking state (English) Origin & history Named after James Hartle and Stephen Hawking. Noun Hartle-Hawking state (pl. Hartle-Hawking states) A hypothetical state of the universe prior to the Planck … christina m brownWebThe Hartle–Hawking state is the wave function of the Universe —a notion meant to figure out how the Universe started—that is calculated from Feynman's path integral. More … christina mcallister forrester