Phase diagram of the large N Gross-Neveu model in a finite periodic box

We analyze the Gross-Neveu model in the limit of large number of flavors of massless fermions. We study the phase diagram in a two and three dimensional periodic box at a fixed thermal to spatial aspect ratio, beta/l with a flavor independent chemical potential. We assume the bilinear condensate, when one exists, has a specific momentum in the spatial direction(s). The main known features of the phase diagram in the l -> infinity limit of the two dimensional model are also seen on a finite l x beta torus-a phase with a homogeneous (zero momentum) condensate; a phase with an inhomogeneous (nonzero momentum) condensate and a phase with no condensate. We observe that the inhomogeneous phase contains several subphases characterized by a specific spatial momentum. Unlike the two dimensional model, we do not find evidence for a phase with a inhomogeneous condensate in the three dimensional model.