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

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 u...

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Bibliographic Details
Published in:arXiv.org 2008-01
Main Authors: Marchioro, Dafni Z, Nedel, Daniel L
Format: Article
Language:English
Subjects:
Asymptotic properties
Black holes
Hilbert space
Observers
Strings
Time dependence
Wave propagation
Online Access:Get full text
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.0711.0556