Vortex excitation in superfluid He-4: A diffusion Monte Carlo study

被引：21

作者：

Giorgini, S

Boronat, J

Casulleras, J

机构：

[1] IST NAZL FIS MAT,I-38050 POVO,ITALY

[2] UNIV POLITECN CATALUNYA,DEPT FIS & ENGN NUCL,E-08028 BARCELONA,SPAIN

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 77卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.77.2754

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a diffusion Monte Carlo study of a single vortex in two-dimensional superfluid liquid He-4 within the fixed-node approximation. We use both the Feynman phase and an improved phase which includes backflow correlations to model the nodal surface of the vortex wave function. Results for the particle density, core radius, and excitation energies are presented.

引用

页码：2754 / 2757

页数：4

共 16 条

[1] A NEW DETERMINATION OF THE GROUND-STATE INTERATOMIC POTENTIAL FOR HE-2 [J].

AZIZ, RA ;

MCCOURT, FRW ;

WONG, CCK .

MOLECULAR PHYSICS, 1987, 61 (06) :1487-1511

[2] UNBIASED ESTIMATORS IN QUANTUM MONTE-CARLO METHODS - APPLICATION TO LIQUID-HE-4 [J].

CASULLERAS, J ;

BORONAT, J .

PHYSICAL REVIEW B, 1995, 52 (05) :3654-3661

[3] ON THEORY OF QUANTIZED VORTICES [J].

CHESTER, GV ;

METZ, R ;

REATTO, L .

PHYSICAL REVIEW, 1968, 175 (01) :275-&

[4] STRUCTURE OF VORTICES IN HELIUM AT ZERO TEMPERATURE [J].

DALFOVO, F .

PHYSICAL REVIEW B, 1992, 46 (09) :5482-5488

[5]

Donnelly R. J., 1991, QUANTIZED VORTICES H, V2

[6] VORTICES IN AN IMPERFECT BOSE GAS .I. CONDENSATE [J].

FETTER, AL .

PHYSICAL REVIEW, 1965, 138 (2A) :A429-+

[7]

Feynman R. P, 1955, PROGR LOW TEMPERATUR, V1

[8] ENERGY SPECTRUM OF THE EXCITATIONS IN LIQUID HELIUM [J].

FEYNMAN, RP ;

COHEN, M .

PHYSICAL REVIEW, 1956, 102 (05) :1189-1204

[9]

GIORGINI S, IN PRESS PHYS REV B

[10] STRUCTURE OF A QUANTIZED VORTEX IN BOSON SYSTEMS [J].

GROSS, EP .

NUOVO CIMENTO, 1961, 20 (03) :454-+

← 1 2 →