Cosmological event horizons, thermodynamics, and particle creation

Gibbons, G. W.; Hawking, S. W.

doi:10.1142/9789812384935_0009

Cited by 554 publications

(1,125 citation statements)

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“…The cosmic no hair conjecture infers that the inflationary universe approaches asymptotically the de Sitter spacetime till the end of inflation [13]. Nevertheless, the effects of matter and spacetime inhomogeneities on inflation should be considered as long as the duration of inflation is finite, our Universe accidentally locates in the vicinity of these inhomogeneities, or inhomogeneities are being produced during inflation.…”

Section: Jcap11(2014)023 3 Defects In Inflationmentioning

confidence: 99%

Inflaton fluctuations in the presence of cosmological defects

Cho

Wang

2014

J. Cosmol. Astropart. Phys.

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We study quantum fluctuations of a free massless scalar field during inflation in the presence of a point, line, or plane defect such as a black hole, cosmic string, or domain wall, using a perturbative expansion in powers of small defect parameters. We provide results for the scalar two-point correlation functions that show explicitly a small violation of translational invariance during inflation.

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Section: Jcap11(2014)023 3 Defects In Inflationmentioning

confidence: 99%

Inflaton fluctuations in the presence of cosmological defects

Cho

Wang

2014

J. Cosmol. Astropart. Phys.

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“…The physics of asymptotically AdS black holes has been of considerable interest for quite some time [1] because of the AdS/CFT correspondence, which led to an effort to understand strongly coupled thermal field theories living on the AdS boundary. Recently the thermodynamic properties of these kinds of black holes have been a subject of intense interest because of their qualitatively similar behaviour to a Van der Waals fluid once rotation and/or charge are added [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…Recently the thermodynamic properties of these kinds of black holes have been a subject of intense interest because of their qualitatively similar behaviour to a Van der Waals fluid once rotation and/or charge are added [2][3][4]. However the analogy is complete [5,6] only when the the cosmological constant Λ < 0 is interpreted as thermodynamic pressure P = P Λ , [7,8] 1) and is allowed to vary in the first law of black hole thermodynamics, δM = T δS + V δP + . .…”

Section: Introductionmentioning

confidence: 99%

Van Der Waals black holes in d dimensions

Delsate

Mann

2015

J. High Energ. Phys.

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We generalize the recent solution proposed by Rajagopal et al. to arbitrary number of dimensions and horizon topologies. We comment on the regime of validity of these solution. Among our main results, we argue that the Van Der Waals (VdW) black hole (BH) metric is to be interpreted as a near horizon metric. This is supported by inspecting the energy conditions. We analyze the limiting cases of a perfect fluid, interacting points and non interacting balls gas equation of state and map them to known black holes. Finally, we provide a case study by comparing the Reissner-Nordström and VdW BH close to the horizon and show that they are qualitatively similar for some range of the horizon radius.

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“…It has been known for some time [12,13,14,15] that de Sitter space has a one-parameter family of vacuum states invariant under the de Sitter isometry group, called α-vacua. There is a unique member of this family which has the same short-distance singularity as in flat space [14,16], which is also the Euclidean vacuum obtained by analytic continuation from the sphere [17,18]. There has nonetheless been considerable controversy in the literature about whether the additional de Sitter-invariant vacua are physical, particularly focusing on the definition of an interacting theory [19,20,21,22,23,24,25,26,27,28,29,30].…”

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confidence: 99%

Time-dependent spacetimes in AdS/CFT: Bubble and black hole

Ross

Titchener

2005

J. High Energy Phys.

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We extend the study of time-dependent backgrounds in the AdS/CFT correspondence by examining the relation between bulk and boundary for the smooth 'bubble of nothing' solution and for the locally AdS black hole which has the same asymptotic geometry. These solutions are asymptotically locally AdS, with a conformal boundary conformal to de Sitter space cross a circle. We study the cosmological horizons and relate their thermodynamics in the bulk and boundary. We consider the α-vacuum ambiguity associated with the de Sitter space, and find that only the Euclidean vacuum is well-defined on the black hole solution. We argue that this selects the Euclidean vacuum as the preferred state in the dual strongly coupled CFT. * S

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Cosmological event horizons, thermodynamics, and particle creation

Cited by 554 publications

References 0 publications

Inflaton fluctuations in the presence of cosmological defects

Inflaton fluctuations in the presence of cosmological defects

Van Der Waals black holes in d dimensions

Time-dependent spacetimes in AdS/CFT: Bubble and black hole

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