Hard-sphere Bose gas in random external potentials

Journal Article · Mon Jul 27 04:00:00 EDT 1992 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.69.644· OSTI ID:7285438

Huang, K; Meng, H ^[1]

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1. Department of Physics and Center for Theoretical Physics, Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States) Department of Mathematics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

We consider a dilute hard-sphere Bose gas in random external potentials at low temperatures, in {ital D}=3, using the technique of pseudopotentials and the Bogoliubov transformation. At absolute zero, the random potentials can deplete the Bose condensate, though not completely. On the other hand, they generate an amount of normal fluid equal to 4/3 the condensate depletion. This is a localization effect that can destroy superfluidity at absolute zero. General features of the superfluid density in the neighborhood of this transition point agree qualitatively with experimental results on helium in porous media.

• DOE Contract Number: AC02-76ER03069
• OSTI ID: 7285438
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 69:4; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

665420* -- Superfluidity-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BOSE-EINSTEIN CONDENSATION
CONFINEMENT
EVEN-EVEN NUCLEI
FLUIDS
HELIUM 4
HELIUM II
HELIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
MATERIALS
NUCLEI
PHASE TRANSFORMATIONS
POROUS MATERIALS
QUANTUM FLUIDS
STABLE ISOTOPES
SUPERFLUIDITY
TEMPERATURE ZERO K
THREE-DIMENSIONAL CALCULATIONS