Gauge-gravity correspondence in an accelerating universe

Buchel, Alex

doi:10.1103/physrevd.65.125015

Cited by 52 publications

(115 citation statements)

References 20 publications

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“…For specificity, let us focus on the solutions in [186,187], which are appropriate for the deformed conifold throats in our discussion. These solutions are found as perturbations around the de Sitter-like slicing of AdS 5 T 1;1 , and, in fact, the perturbations disappear at the bottom of the throat, leaving an AdS 5 T 1;1 core.…”

Section: Ads-like Solutionsmentioning

confidence: 99%

“…However, the supergravity stress tensor (sourced by supergravity fluxes) would vanish asymptotically, leading to a contradiction. This analysis is born out by examining the equations of motion acting on a supergravity ansatz that generalizes [186,187]. 27 However, it is possible that the solutions of [186,187] are approximate solutions for throats in the compactification in a region far from both the tip and the bulk.…”

Section: Ads-like Solutionsmentioning

confidence: 99%

“…0 asymptotically (which is possible for the flat spacetime solutions [75,76]). Suppose that we tried to modify to solutions of [186,187] to have A ! 0 asymptotically.…”

Section: Ads-like Solutionsmentioning

confidence: 99%

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Stringy effects during inflation and reheating

2006

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We consider inflationary cosmology in the context of string compactifications with multiple throats. In scenarios where the warping differs significantly between throats, string and Kaluza-Klein physics can generate potentially observable corrections to the cosmology of inflation and reheating. First we demonstrate that a very low string scale in the ground state compactification is incompatible with a high Hubble scale during inflation, and we propose that the compactification geometry is altered during inflation. In this configuration, the lowest scale is just above the Hubble scale, which is compatible with the effective field theory but still leads to potentially observable cosmic microwave background corrections. Also in the appropriate region of parameter space, we find that reheating leads to a phase of long open strings in the standard model sector (before the usual radiation-dominated phase). We sketch the cosmology of the long string phase and we discuss possible observational consequences.

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Section: Ads-like Solutionsmentioning

confidence: 99%

Section: Ads-like Solutionsmentioning

confidence: 99%

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Stringy effects during inflation and reheating

2006

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“…Thus, we can also regard the version of AdS given by (2.3) as the bulk dual of the CFT on the dS d global manifold with metric (2.4) (cf. [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]). Not surprisingly, the two boundary metrics are conformally related by a Weyl rescaling and a time diffeomorphism:…”

Section: A Simple Model Of Cosmological Complementaritymentioning

confidence: 99%

Conformal complementarity maps

Barbón

Rabinovici

2013

J. High Energ. Phys.

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We study quantum cosmological models for certain classes of bang/crunch singularities, using the duality between expanding bubbles in AdS with a FRW interior cosmology and perturbed CFTs on de Sitter space-time. It is pointed out that horizon complementarity in the AdS bulk geometries is realized as a conformal transformation in the dual deformed CFT. The quantum version of this map is described in full detail in a toy model involving conformal quantum mechanics. In this system the complementarity map acts as an exact duality between eternal and apocalyptic Hamiltonian evolutions. We calculate the commutation relation between the Hamiltonians corresponding to the different frames. It vanishes only on scale invariant states.

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“…In addition, F (3) and F (5) satisfy Bianchi identities which follow from the definition of the field strengths in terms of their potentials:…”

Section: Conventionsmentioning

confidence: 99%

Effective action of string theory flux compactifications

Buchel

2004

Phys. Rev. D

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We discuss four dimensional effective actions of string theory flux compactifications.These effective actions describe four dimensional gravity coupled to overall Kähler modulus of the compactification manifold. We demonstrate the agreement between ten dimensional equations of motion of supergravity with localized branes, and equations of motion derived from the effective action. The agreement is lost however if one evaluates the full effective action on the equations of motion for a subset of the supergravity modes, provided these modes depend on-shell on the Kähler modulus.

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Gauge-gravity correspondence in an accelerating universe

Cited by 52 publications

References 20 publications

Stringy effects during inflation and reheating

Stringy effects during inflation and reheating

Conformal complementarity maps

Effective action of string theory flux compactifications

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