We investigate N=4 SYM coupled to fundamental flavours at nonzero imaginary quark chemical potential in the strong coupling and large N limit, using gauge/gravity duality applied to the D3-D7 system, treating flavours in the probe approximation. The interplay between Z(N) symmetry and the imaginary chemical potential yields a series of first-order Roberge-Weiss transitions. An additional thermal transition separates phases where quarks are bound/unbound into mesons. This results in a set of Roberge-Weiss endpoints: we establish that these are triple points, determine the Roberge-Weiss temperature, give the curvature of the phase boundaries and confirm that the theory is analytic in mu^2 when mu^2~0.
@article{arxiv.1005.2947,
title = {Holographic Roberge-Weiss Transitions},
author = {Gert Aarts and S. Prem Kumar and James Rafferty},
journal= {arXiv preprint arXiv:1005.2947},
year = {2015}
}
Comments
37 pages, 13 figures; minor comments added, to appear in JHEP