Ab initio quantum Monte Carlo simulations of the uniform electron gas without fixed nodes: The unpolarized case
Ab initio quantum Monte Carlo simulations of the uniform electron gas without fixed nodes: The unpolarized case
复制标题
无固定节点的均匀电子气从头算量子蒙特卡罗模拟:非极化情况
DOI:
10.1103/physrevb.93.205134
复制
发表时间:
2016
影响因子:
3.7
通讯作者:
M. Bonitz
中科院分区:
文献类型:
--
作者:
T. Dornheim;S. Groth;T. Schoof;M. Bonitz
In a recent publication [S. Groth , Phys. Rev. B 93, 085102 (2016)2469-995010.1103/PhysRevB.93.085102], we have shown that the combination of two complementary quantum Monte Carlo approaches, namely configuration path integral Monte Carlo [T. Schoofet al., Phys. Rev. Lett. 115, 130402 (2015)PRLTAO0031-900710.1103/PhysRevLett.115.130402] and permutation blocking path integral Monte Carlo [T. Dornheimet al., New J. Phys. 17, 073017 (2015)NJOPFM1367-263010.1088/1367-2630/17/7/073017], allows for the accurate computation of thermodynamic properties of the spin-polarized uniform electron gas over a wide range of temperatures and densities without the fixed-node approximation. In the present work, we extend this concept to the unpolarized case, which requires nontrivial enhancements that we describe in detail. We compare our simulation results with recent restricted path integral Monte Carlo data [E. W. Brownet al., Phys. Rev. Lett. 110, 146405 (2013)PRLTAO0031-900710.1103/PhysRevLett.110.146405] for different energy contributions and pair distribution functions and find, for the exchange correlation energy, overall better agreement than for the spin-polarized case, while the separate kinetic and potential contributions substantially deviate.
登录
查看更多内容
DOI:
10.1088/0305-4470/34/8/312
发表时间:
2001
期刊:
Journal of Physics A: Mathematical and General
影响因子:
--
作者:
V. Filinov
通讯作者:
V. Filinov
DOI:
10.1103/physreve.61.3470
发表时间:
1999
期刊:
Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
影响因子:
--
作者:
B. Militzer;E. L. Pollock
通讯作者:
E. L. Pollock
影响因子:
8.6
作者:
P. Schmit;P. Knapp;S. B. Hansen;M. Gomez;K. Hahn;D. Sinars;K. Peterson;S. Slutz;A. Sefkow;T. Awe;E. Harding;C. A. Jennings;G. Chandler;G. Cooper;M. Cuneo;M. Geissel;A. Harvey;M. Herrmann;M. H. Hess;O. Johns;D. Lamppa;M. R. Martin;R. D. McBride;J. L. Porter;G. Robertson;G. Rochau;D. Rovang;C. L. Ruiz;M. E. Savage;I. C. Smith;W. Stygar;R. Vesey
通讯作者:
R. Vesey
影响因子:
3.7
作者:
E. Brown;J. Dubois;M. Holzmann;D. Ceperley
通讯作者:
E. Brown;J. Dubois;M. Holzmann;D. Ceperley
影响因子:
8.6
作者:
T. Schoof;S. Groth;J. Vorberger;M. Bonitz
通讯作者:
T. Schoof;S. Groth;J. Vorberger;M. Bonitz