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Titolo:
MONTE-CARLO SIMULATIONS OF THE CHARGED BOSON FLUID AT T=0
Autore:
MORONI S; CONTI S; TOSI MP;
Indirizzi:
SCUOLA NORMALE SUPER PISA,IST NAZL FIS MAT & CLASSE SCI,PIAZZA CAVALIERI 7 I-56126 PISA ITALY
Titolo Testata:
Physical review. B, Condensed matter
fascicolo: 15, volume: 53, anno: 1996,
pagine: 9688 - 9696
SICI:
0163-1829(1996)53:15<9688:MSOTCB>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
GROUND-STATE; DIELECTRIC RESPONSE; 3 DIMENSIONS; GAS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
36
Recensione:
Indirizzi per estratti:
Citazione:
S. Moroni et al., "MONTE-CARLO SIMULATIONS OF THE CHARGED BOSON FLUID AT T=0", Physical review. B, Condensed matter, 53(15), 1996, pp. 9688-9696

Abstract

The diffusion Monte Carlo (DMC) method is used to analyze various properties of the three-dimensional plasma of charged bosons in the homogeneous fluid regime, over the density range 1 less than or equal to r(s) less than or equal to 160 extending from the so-called uniform limit (r(s)<1) to the crystalline phase (r(s)>160). The data on the staticdensity response function chi(k) extend to intermediate and high wavenumber k the work of Sugiyama, Bowen, and Alder [Phys. Rev. B 46, 13 042 (1999)] and allow us to extract the static local-held factor G(k) for exchange and correlation. The DMC results for the momentum distribution n(k) show that the condensate fraction decreases with increasingcoupling strength from 83% at r(s)=1 to less than 1% at r(s)=160. We also present results for the ground-state energy E(g)(r(s)) and for the structure factor S(k). The results for E(g)(r(s)), n(k), and chi(k) are summarized in analytic interpolation formulas embodying the known asymptotic behaviors. A rigorous upper bound on the plasmon dispersioncurve is obtained from the DMC data through a sum-rule argument.

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Documento generato il 04/12/20 alle ore 09:54:31