Weakly interacting two-dimensional system of dipoles: Limitations of the mean-field theory
Journal Article
·
· Physical Review. A
- Departament de Fisica i Enginyeria Nuclear, Campus Nord B4-B5, Universitat Politecnica de Catalunya, E-08034 Barcelona (Spain)
We consider a homogeneous two-dimensional Bose gas with repulsive dipole-dipole interactions. The ground-state equation of state, calculated using the diffusion Monte Carlo method, shows quantitative differences from the predictions of the commonly used Gross-Pitaevskii mean-field theory. The static structure factor, pair distribution function, and condensate fraction are calculated in a wide range of the gas parameter. Differences from mean-field theory are reflected in the frequency of the lowest ''breathing'' mode for harmonically trapped systems.
- OSTI ID:
- 21000515
- Journal Information:
- Physical Review. A, Vol. 75, Issue 6; Other Information: DOI: 10.1103/PhysRevA.75.063630; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BOSE-EINSTEIN CONDENSATION
BOSE-EINSTEIN GAS
BOSONS
DIFFUSION
DIFFUSION EQUATIONS
DIPOLES
DISTRIBUTION FUNCTIONS
EQUATIONS OF STATE
FORECASTING
GROUND STATES
INTERACTIONS
MEAN-FIELD THEORY
MONTE CARLO METHOD
STRUCTURE FACTORS
TRAPPING
TWO-DIMENSIONAL CALCULATIONS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BOSE-EINSTEIN CONDENSATION
BOSE-EINSTEIN GAS
BOSONS
DIFFUSION
DIFFUSION EQUATIONS
DIPOLES
DISTRIBUTION FUNCTIONS
EQUATIONS OF STATE
FORECASTING
GROUND STATES
INTERACTIONS
MEAN-FIELD THEORY
MONTE CARLO METHOD
STRUCTURE FACTORS
TRAPPING
TWO-DIMENSIONAL CALCULATIONS