Thermodynamics of the uniform electron gas: Fermionic path integral Monte Carlo simulations in the restricted grand canonical ensemble

The uniform electron gas (UEG) is one of the key models for understanding warm dense matter—an exotic, highly compressed state matter between solid and plasma phases. difficulty in modelling UEG arises from need to simultaneously account Coulomb correlations, quantum effects, exchange as well finite temperature. most accurate results so far were obtained Monte Carlo (QMC) simulations with a variety representations. However, QMC electrons hampered by fermion sign problem. Here, we present novel fermionic propagator path integral restricted grand canonical ensemble. ab initio simulation spin-resolved pair distribution functions static structure factor are reported two isotherms (T units Fermi temperature). Furthermore, combine linear response theory Singwi-Tosi-Land-Sjölander scheme data remove finite-size errors interaction energy. We new corrected parametrization energy exchange–correlation free thermodynamic limit, benchmark our against Brown et al. [Phys. Rev. Lett. 110, 146405 (2013)] configuration Carlo/permutation-blocking Dornheim 117, 115701 (2016)].