Observer dependent D-brane for strings propagating in pp-wave time dependent background

Abstract

We study type IIB superstring in the pp-wave time-dependent background, which has a singularity at $t=0$. We show that this background can provide a toy model to study some ideas related to the stretched horizon paradigm and the complementary principle of black holes. To this end, we construct a unitary Bogoliubov generator which relates the asymptotically flat string Hilbert space, defined at $t=\pm \infty$, to the finite time Hilbert space. For asymptotically flat observers, the closed string vacuum close to the singularity appears as a boundary state which is in fact a D-brane described in the closed string channel. However, observers who go with the string towards to the singularity see the original vacuum.

12 pages, revtex 4, added references, corrected mistakes

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Cited by in corpus (5)

• String Entanglement and D-branes as Pure States
• String in AdS Black Hole: A Thermo Field Dynamic Approach
• Left/right entanglement and thermalization of time dependent plane wave Green-Schwarz superstring
• On the Hagedorn behavior of the superstring propating in a cosmological time dependent background
• Quantization of Open strings in time dependent Black Holes