Instability of Non-Commutative SYM Theories at Finite Temperature
High Energy Physics - Theory
2010-02-03 v3
Abstract
We extend our previous work on the quasi-particle excitations in N=4 non-commutative U(1) Yang-Mills theory at finite temperature. We show that above some critical temperature there is a tachyon in the spectrum of excitations. It is a collective transverse photon mode polarized in the non-commutative plane. Thus the theory seems to undergo a phase transition at high temperature. Furthermore we find that the group velocity of quasi-particles generically exceeds the speed of light at low momentum.
Keywords
Cite
@article{arxiv.hep-th/0104133,
title = {Instability of Non-Commutative SYM Theories at Finite Temperature},
author = {Karl Landsteiner and Esperanza Lopez and Michel H. G. Tytgat},
journal= {arXiv preprint arXiv:hep-th/0104133},
year = {2010}
}
Comments
23 pages (harvmac b-mode), 5 figures, v2: discussion on U(N) theories and matter in fundamental representation added, misprints corrected, references added v3: reference added