Ab Initio Simulations of Dense Helium Plasmas

Journal Article · Fri Apr 08 00:00:00 EDT 2011 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.106.145002· OSTI ID:21550284

Cong, Wang ^[1]; Xiantu, He; Ping, Zhang ^[1]

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1. LCP, Institute of Applied Physics and Computational Mathematics, P.O. Box 8009, Beijing 100088 (China)

We study the thermophysical properties of dense helium plasmas by using quantum molecular dynamics and orbital-free molecular dynamics simulations, where densities are considered from 400 to 800 g/cm{sup 3} and temperatures up to 800 eV. Results are presented for the equation of state. From the Kubo-Greenwood formula, we derive the electrical conductivity and electronic thermal conductivity. In particular, with the increase in temperature, we discuss the change in the Lorenz number, which indicates a transition from strong coupling and degenerate state to moderate coupling and partial degeneracy regime for dense helium.

• OSTI ID: 21550284
• Journal Information: Physical Review Letters, Vol. 106, Issue 14; Other Information: DOI: 10.1103/PhysRevLett.106.145002; (c) 2011 American Institute of Physics; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COUPLING
DENSITY
ELECTRIC CONDUCTIVITY
EQUATIONS OF STATE
EV RANGE 100-1000
HELIUM
MOLECULAR DYNAMICS METHOD
PLASMA
SIMULATION
STRONG-COUPLING MODEL
THERMAL CONDUCTIVITY
CALCULATION METHODS
ELECTRICAL PROPERTIES
ELEMENTS
ENERGY RANGE
EQUATIONS
EV RANGE
FLUIDS
GASES
MATHEMATICAL MODELS
NONMETALS
PARTICLE MODELS
PHYSICAL PROPERTIES
RARE GASES
THERMODYNAMIC PROPERTIES