arXiv:2305.07601 · Journal of Physics A Mathematical and Theoretical

Density of states of a 2D system of soft-sphere fermions by path integral Monte Carlo simulations

Vladimir S. Filinov, Pavel R. Levashov, A Larkin

Published Jul 18, 2023• 3 citations

Abstract

Abstract The Wigner formulation of quantum mechanics is used to derive a new path integral representation of quantum density of states (DOSs). A path integral Monte Carlo approach is developed for the numerical investigation of DOSs, internal energy and spin-resolved radial distribution functions for a 2D system of strongly correlated soft-sphere fermions. The peculiarities of the DOSs and internal energy distributions depending on the hardness of the soft-sphere potential and particle density are investigated and explained. In particular, at high enough densities the DOSs rapidly tends to a constant value, as for an ideal system of 2D fermions.

DOI: 10.1088/1751-8121/ace867

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