AdS Bubbles, Entropy and Closed String Tachyons

Details AdS Bubbles, Entropy and Closed String Tachyons AdS Bubbles, Entropy and Closed String Tachyons

2006-11-03

arxiv.org/abs/hep-th/0611035v2

JHEP 0701:090,2007

Physics

High Energy Physics

High Energy Physics - Theory

45 pages, 6 figures, harvmac, eq.(2.16) corrected, references added

Scientific paper

10.1088/1126-6708/2007/01/090

We study the conjectured connection between AdS bubbles (AdS solitons) and closed string tachyon condensations. We confirm that the entanglement entropy, which measures the degree of freedom, decreases under the tachyon condensation. The entropies in supergravity and free Yang-Mills agree with each other remarkably. Next we consider the tachyon condensation on the AdS twisted circle and argue that its endpoint is given by the twisted AdS bubble, defined by the double Wick rotation of rotating black 3-brane solutions. We calculated the Casimir energy and entropy and checked the agreements between the gauge and gravity results. Finally we show an infinite boost of a null linear dilaton theory with a tachyon wall (or bubble), leads to a solvable time-dependent background with a bulk tachyon condensation. This is the simplest example of spacetimes with null boundaries in string theory.

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