An exact two-parameter analytic solution for a hairy black brane is derived in AdS-Einstein-scalar gravity, with thermodynamics obeying a generalized first law and Euler relation, and the boundary theory recovering nearly conformal fluid behavior in the IR thermal limit.
Instanton Cosmology and Domain Walls from M-theory and String Theory
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abstract
The recent proposal by Hawking and Turok for obtaining an open inflationary universe from singular instantons makes use of low-energy effective Lagrangians describing gravity coupled to scalars and non-propagating antisymmetric tensors. In this paper we derive some exact results for Lagrangians of this type, obtained from spherical compactifications of M-theory and string theory. In the case of the S^7 compactification of M-theory, we give a detailed discussion of the cosmological solutions. We also show that the lower-dimensional Lagrangians admit domain-wall solutions, which preserve one half of the supersymmetry, and which approach AdS spacetimes near their horizons.
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Time-dependent holographic entanglement entropy and complexity are computed perturbatively for braneworld FLRW universes with radiation, matter, and exotic matter by using time-dependent brane positions in black brane bulk geometries.
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Exact Planar Black Hole in AdS-Einstein-Scalar Gravity with IR Emergent Nearly Conformal Fluid
An exact two-parameter analytic solution for a hairy black brane is derived in AdS-Einstein-scalar gravity, with thermodynamics obeying a generalized first law and Euler relation, and the boundary theory recovering nearly conformal fluid behavior in the IR thermal limit.
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Holographic entanglement entropy and complexity for the cosmological braneworld model
Time-dependent holographic entanglement entropy and complexity are computed perturbatively for braneworld FLRW universes with radiation, matter, and exotic matter by using time-dependent brane positions in black brane bulk geometries.