Theorie des Quanten‐Plasmas

Kelbg, G.

doi:10.1002/andp.19634670308

Cited by 174 publications

(134 citation statements)

References 9 publications

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“…In the high-temperature limit, ρ ab factorizes into a kinetic (ρ 0 ) and an interaction term (ρ ab U ), ρ ab ≈ ρ 0 ρ ab U , because it can be shown that [40,41] …”

Section: High-temperature Asymptotics Of the Density Matrix In Tmentioning

confidence: 99%

Thermodynamics of hot dense H-plasmas: path integral Monte Carlo simulations and analytical approximations

Филинов

Bönitz

Ébeling

et al. 2001

Plasma Phys. Control. Fusion

127

149

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This work is devoted to the thermodynamics of high-temperature dense hydrogen plasmas in the pressure region between 10 −1 and 10 2 Mbar. In particular we present for this region results of extensive calculations based on a recently developed path integral Monte Carlo scheme (direct PIMC). This method allows for a correct treatment of the thermodynamic properties of hot dense Coulomb systems. Calculations were performed in a broad region of the nonideality parameter Γ 3 and degeneracy parameter n e Λ 3 10. We give a comparison with a few available results from other path integral calculations (restricted PIMC) and with analytical calculations based on Padé approximations for strongly ionized plasmas. Good agreement between the results obtained from the three independent methods is found.

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“…In the high-temperature limit, ρ ab factorizes into a kinetic (ρ 0 ) and an interaction term (ρ ab U ), ρ ab ≈ ρ 0 ρ ab U , because it can be shown that [40,41] …”

Section: High-temperature Asymptotics Of the Density Matrix In Tmentioning

confidence: 99%

Thermodynamics of hot dense H-plasmas: path integral Monte Carlo simulations and analytical approximations

Филинов

Bönitz

Ébeling

et al. 2001

Plasma Phys. Control. Fusion

127

149

View full text Add to dashboard Cite

show abstract

“…Here U eff is the effective pair action, 26,28 introduced in a way that at large distances and (or) high temperatures it reduces to β(e 2 / |r hh | + E (n) e (r hh )). Substituted in Eq.…”

mentioning

confidence: 99%

Crystallization of an exciton superfluid

2011

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Indirect excitons -pairs of electrons and holes spatially separated in semiconductor bilayers or quantum wells -are known to undergo Bose-Einstein condensation and to form a quantum fluid. Here we show that this superfluid may crystallize upon compression. However, further compression results in quantum melting back to a superfluid. This unusual behavior is explained by the effective interaction potential between indirect excitons which strongly deviates from a dipole potential at small distances due to many-particle and quantum effects. Based on first principle path integral Monte Carlo simulations, we compute the complete phase diagram of this system and predict the relevant parameters necessary to experimentally observe exciton crystallization in semiconductor quantum wells.

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“…For large distances r > δ the potential becomes Coulomb, while for r < δ the Coulomb singularity is removed and u ei (0) = 1/δ. By this the short range effects based on the uncertainty principle are included [31][32][33]. For a classical description of a plasma the electron degeneracy parameter Θ e , i.e., the ratio of the thermal energy and the Fermi energy must fulfill Θ e = k B T /E F > 1.…”

Section: MD Simulationsmentioning

confidence: 99%

Microfield Fluctuations and Spectral Line Shapes in Strongly Coupled Two–Component Plasmas

Nersisyan

Toepffer

Zwicknagel

2010

Contrib. Plasma Phys.

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The spectral line shapes for hydrogen-like heavy ion emitters embedded in strongly correlated two-component electron-ion plasmas are investigated with numerical simulations. For that purpose the microfield fluctuations are calculated by molecular dynamics simulations where short range quantum effects are taken into account by using a regularized Coulomb potential for the electronion interaction. The microfield fluctuations are used as input in a numerical solution of the timedependent Schrödinger equation for the radiating electron. In distinction to the standard impact and quasistatic approximations the method presented here allows to account for the correlations between plasma ions and electrons. The shapes of the Lyα-line in Al are investigated in the intermediate regime. The calculations are in good agreement with experiments on the Lyα-line in laser generated plasmas.

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Theorie des Quanten‐Plasmas

Cited by 174 publications

References 9 publications

Thermodynamics of hot dense H-plasmas: path integral Monte Carlo simulations and analytical approximations

Thermodynamics of hot dense H-plasmas: path integral Monte Carlo simulations and analytical approximations

Crystallization of an exciton superfluid

Microfield Fluctuations and Spectral Line Shapes in Strongly Coupled Two–Component Plasmas

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