Dilute D-Instantons at Finite Temperature
Abstract
We discuss Dirichlet instanton effects on type-IIB string Thermodynamics. We review some general properties of dilute D-instanton gases and use the low-energy supergravity solutions to define the normalization of the instanton measure, as well as the effects of long-range interactions. Thermal singularities in the single-instanton sector are due to tachyonic winding modes of Dirichlet open strings. Purely bosonic D-instantons induce in this way hard infrared singularities that ruin the weak-coupling expansion in the microcanonical ensemble. However, type-IIB D-instantons, give smooth contributions at the Hagedorn temperature, and the induced mass and coupling of the axion field are insufficient to change the first-order character of the phase transition in the mean field approximation.
Keywords
Cite
@article{arxiv.hep-th/9701142,
title = {Dilute D-Instantons at Finite Temperature},
author = {J. L. F. Barbon and M. A. Vazquez-Mozo},
journal= {arXiv preprint arXiv:hep-th/9701142},
year = {2009}
}
Comments
45 pp, harvmac, typos corrected and references added