Inflation in AdS/CFT

Freivogel, Ben ; /Stanford U., Phys. Dept. /LBL, Berkeley ; Hubeny, Veronika E. ; /LBL, Berkeley /Durham U., Dept. of Math. ; Maloney, Alexander ; /Stanford U., Phys. Dept. /SLAC ; Myers, Rob ; U., /Perimeter Inst. Theor. Phys. /Waterloo ; Rangamani, Mukund ; /LBL, Berkeley /Durham U., Dept. of Math. ; Shenker, Stephen ; /Stanford U., Phys. Dept.

Stanford Linear Accelerator Center

关键词: De Sitter Group Theory-Hep,Grqc, Hepth;    Inflationary Universe;    String Models;    71 Classical And Quantum Mechanics, General Physics;    Theory-Hep,Grqc, Hepth;   

DOI  :  10.2172/878087
RP-ID  :  SLAC-PUB-11505
RP-ID  :  AC02-76SF00515
RP-ID  :  878087

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来源: UNT Digital Library

【 摘 要 】

We study the realization of inflation within the AdS/CFT correspondence. We assume the existence of a string landscape containing at least one stable AdS vacuum and a (nearby) metastable de Sitter state. Standard arguments imply that the bulk physics in the vicinity of the AdS minimum is described by a boundary CFT. We argue that large enough bubbles of the dS phase, including those able to inflate, are described by mixed states in the CFT. Inflating degrees of freedom are traced over and do not appear explicitly in the boundary description. They nevertheless leave a distinct imprint on the mixed state. Analytic continuation allows us, in principle, to recover a large amount of nonperturbatively defined information about the inflating regime. Our work also shows that no scattering process can create an inflating region, even by quantum tunneling, since a pure state can never evolve into a mixed state under unitary evolution.We study the realization of inflation within the AdS/CFT correspondence. We assume the existence of a string landscape containing at least one stable AdS vacuum and a (nearby) metastable de Sitter state. Standard arguments imply that the bulk physics in the vicinity of the AdS minimum is described by a boundary CFT. We argue that large enough bubbles of the dS phase, including those able to inflate, are described by mixed states in the CFT. Inflating degrees of freedom are traced over and do not appear explicitly in the boundary description. They nevertheless leave a distinct imprint on the mixed state. Analytic continuation allows us, in principle, to recover a large amount of nonperturbatively defined information about the inflating regime. Our work also shows that no scattering process can create an inflating region, even by quantum tunneling, since a pure state can never evolve into a mixed state under unitary evolution.