A time-dependent brane in a cosmological background
Nicolaos Toumbas, Jan Troost
TL;DR
This paper investigates a moving D-brane in a dynamic cosmological setting, analyzing particle production and string emission effects, with a focus on a D0-brane in an SL(2,R)/U(1) cosmology, applicable to broader backgrounds.
Contribution
It introduces a method to analyze D-brane dynamics in time-dependent backgrounds, specifically addressing particle and string emission in cosmological models.
Findings
Particle production occurs due to cosmological evolution.
Closed string emission causes the brane to decelerate.
The techniques are extendable to other cosmological backgrounds.
Abstract
We study a moving D-brane in a time-dependent background. There is particle production both because of non-trivial cosmological evolution, and by closed string emission from the brane that gradually decelerates due to a gain in mass. The particular model under study is a D0-brane in an SL(2,R)/U(1) cosmology -- the techniques used extend to other backgrounds.
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