Boundary states for the rolling D-branes in NS5 background

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Published 5 August 2004 • Published under licence by IOP Publishing Ltd
, , Citation Yu Nakayama et al JHEP07(2004)020 DOI 10.1088/1126-6708/2004/07/020

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1 Department of Physics, Faculty of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan

Dates

  1. Received 8 July 2004
  2. Accepted 11 July 2004
  3. Published

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1126-6708/2004/07/020

Abstract

In this paper we construct the time dependent boundary states describing the ``rolling D-brane solutions'' in the NS5 background discovered recently by Kutasov by means of the classical DBI analysis. We first survey some aspects of non-compact branes in the NS5 background based on known boundary states in the Script N = 2 Liouville theory. We consider two types of non-compact branes, one of which is BPS and the other is non-BPS but stable. Then we clarify how to Wick-rotate the non-BPS one appropriately. We show that the Wick-rotated boundary state realizes the correct trajectory of rolling D-brane in the classical limit, and leads to well behaved spectral densities of open strings due to the existence of non-trivial damping factors of energy. We further study the cylinder amplitudes and the emission rates of massive closed string modes.

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10.1088/1126-6708/2004/07/020