Condensate fraction and momentum distribution in the ground state of liquid sup 4 He

Journal Article · Sat Jun 01 04:00:00 EDT 1991 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.43.13587· OSTI ID:5665352

Manousakis, E ^[1]; Pandharipande, V R ^[2]; Usmani, Q N ^[3]

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1. Department of Physics, Center for Materials Research and Technology Supercomputer Computations Research Institute, Florida State University, Tallahassee, Florida 32306 (USA)
2. Department of Physics and Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61802 (USA)
3. Department of Physics, Jamia Millia Islamia, Jamia Nagar, New Delhi, 110025, India (IN)

In an earlier paper we calculated the condensate fraction and momentum distribution of atoms in liquid {sup 4}He, using a variational wave function which takes into account Jastrow and three-body correlations. In the present paper we point out an error in the expression used to compute the condensate fraction when three-body correlations were included. We report the corrected numerical results for both condensate fraction and momentum distributions for three densities. In addition, we calculate the condensate fraction and momentum distribution with and without the {ital l}=0 part of the three-body correlations in the wave function. Even though the {ital l}=0 part gives a small contribution to the ground-state energy, we find that the {ital l}=0 and {ital l}=1 terms have opposite and almost canceling effects on the condensate fraction and momentum distribution; each term separately alters the results obtained with pure Jastrow correlations by about 15--20 %, while when considered together they give only a small contribution.

• DOE Contract Number: FC05-85ER25000
• OSTI ID: 5665352
• Journal Information: Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 43:16; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

640410* -- Fluid Physics-- General Fluid Dynamics
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANGULAR MOMENTUM
CONDENSATES
CORRELATION FUNCTIONS
ELEMENTS
ENERGY LEVELS
FLUIDS
FUNCTIONS
GASES
GROUND STATES
HELIUM
LIQUIDS
NONMETALS
RARE GASES
WAVE FUNCTIONS