Fermions at Finite Density in 2+1 Dimensions with Sign-Optimized Manifolds
Andrei Alexandru1,2, Paulo F Bedaque2, Henry Lamm2
1Department of Physics, The George Washington University, Washington, D.C. 20052, USA.
Abstract:
We present Monte Carlo calculations of the thermodynamics of the (2+1)-dimensional Thirring model at finite density. We bypass the sign problem by deforming the domain of integration of the path integral into complex space in such a way as to maximize the average sign within a parameterized family of manifolds. We present results for lattice sizes up to 10^{3} and we find that at high densities and/or temperatures the chiral condensate is abruptly reduced.
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