Ab initio quantum Monte Carlo simulation of the warm dense electron gas

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Title: Ab initio quantum Monte Carlo simulation of the warm dense electron gas
Author(s): Dornheim, T
Groth, S
Malone, FD
Schoof, T
Sjostrom, T
Foulkes, WMC
Bonitz, M
Item Type: Journal Article
Abstract: Warm dense matter is one of the most active frontiers in plasma physics due to its relevance for dense astrophysical objects as well as for novel laboratory experiments in which matter is being strongly compressed e.g. by high-power lasers. Its description is theoretically very challenging as it contains correlated quantum electrons at nite temperature|a system that cannot be accurately modeled by standard analytical or ground state approaches. Recently several breakthroughs have been achieved in the eld of fermionic quantum Monte Carlo simulations. First, it was shown that exact simulations of a nite model system (30 : : : 100 electrons) is possible that avoid any simplifying approximations such as xed nodes [Schoof et al., Phys. Rev. Lett. 115, 130402 (2015)]. Second, a novel way to accurately extrapolate these results to the thermodynamic limit was reported by Dornheim et al. [Phys. Rev. Lett. 117, 156403 (2016)]. As a result, now thermodynamic results for the warm dense electron gas are available that have an unprecedented accuracy on the order of 0:1%. Here we present an overview on these results and discuss limitations and future directions.
Publication Date: 6-Mar-2017
Date of Acceptance: 15-Feb-2017
URI: http://hdl.handle.net/10044/1/44705
DOI: https://dx.doi.org/10.1063/1.4977920
ISSN: 1089-7674
Publisher: AIP Publishing
Start Page: 056303-1
End Page: 056303-10
Journal / Book Title: Physics of Plasmas
Volume: 24
Copyright Statement: © 2017 The Authors. Published by AIP Publishing. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in (citation of article) and may be found at http://aip.scitation.org/doi/full/10.1063/1.4977920
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
EPSRC
CSCS Swiss National Supercomputing Centre
Imperial College London
Engineering and Physical Sciences Research Council
Funder's Grant Number: EP/K038141/1
EPSRC RAP Call November 2014
Shepherd_2015_I
e494
Keywords: Fluids & Plasmas
0202 Atomic, Molecular, Nuclear, Particle And Plasma Physics
0201 Astronomical And Space Sciences
0203 Classical Physics
Publication Status: Published
Article Number: 056303
Appears in Collections:Condensed Matter Theory
Physics
Faculty of Natural Sciences



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