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Titolo:
EULER MONTE-CARLO CALCULATIONS FOR LIQUID-HE-4 AND HE-3
Autore:
MORONI S; FANTONI S; SENATORE G;
Indirizzi:
SCUOLA NORMALE SUPER PISA,IST NAZL FIS MAT,FORUM LAB,PIAZZA CAVALIERI7 I-56126 PISA ITALY SCUOLA INT SUPER STUDI AVANZATI,INTERDISCIPLINARY LAB I-34014 TRIESTEITALY INT CTR THEORET PHYS I-34014 TRIESTE ITALY UNIV TRIESTE,DIPARTIMENTO FIS TEOR I-34014 TRIESTE ITALY
Titolo Testata:
Physical review. B, Condensed matter
fascicolo: 18, volume: 52, anno: 1995,
pagine: 13547 - 13558
SICI:
0163-1829(1995)52:18<13547:EMCFLA>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
3-BODY CORRELATIONS; WAVE-FUNCTIONS; FERMION; MATTER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
48
Recensione:
Indirizzi per estratti:
Citazione:
S. Moroni et al., "EULER MONTE-CARLO CALCULATIONS FOR LIQUID-HE-4 AND HE-3", Physical review. B, Condensed matter, 52(18), 1995, pp. 13547-13558

Abstract

We present an optimization procedure for Monte Carlo variational calculations and illustrate it by optimizing pair and triplet correlationsin the ground-state wave functions of liquid He-4 and He-3. We use the optimized trial functions, with a partially optimized backflow for He-3, to perform extensive diffusion Monte Carlo simulations that yieldaccurate results for the equation of state and structural properties of both liquids. The agreement with experiments, which is excellent for He-4, somewhat deteriorates in going to He-3, due to the use of the fixed-node approximation. The remaining appreciable discrepancies between the results of variational and diffusion Monte Carlo unambiguouslypoint to the increasing importance of n-body correlations, with n>3, as the density is increased.

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Documento generato il 05/12/20 alle ore 13:26:35