Quantum backreaction in string theory

Details Quantum backreaction in string theory Quantum backreaction in string theory

2012-01-31

arxiv.org/abs/1201.6606v1

Physics

High Energy Physics

High Energy Physics - Theory

8 pages, proceedings of XVII European Workshop on String Theory

Scientific paper

There are situations in string theory when a finite number of string quanta induce a significant backreaction upon the background and render the perturbation theory infrared-divergent. The simplest example is D0-brane recoil under an impact by closed strings. A more physically interesting case is backreaction on the evolution of a totally compact universe due to closed string gas. Such situations necessitate qualitative amendments to the traditional formulation of string theory in a fixed classical background. In this contribution to the proceedings of the XVII European Workshop on String Theory in Padua, I review solved problems and current investigations in relation to this kind of quantum backreaction effects.

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