Beyond the Tonks-Girardeau Gas: Strongly Correlated Regime in Quasi-One-Dimensional Bose Gases

Journal Article · Fri Nov 04 00:00:00 EST 2005 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.95.190407· OSTI ID:20699526

Astrakharchik, G E ^[1]; Boronat, J; Casulleras, J ^[2]; Giorgini, S ^[1]

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1. Dipartimento di Fisica, Universita di Trento and BEC-INFM, I-38050 Povo (Italy)
2. Departament de Fisica i Enginyeria Nuclear, Campus Nord B4-B5, Universitat Politecnica de Catalunya, E-08034 Barcelona (Spain)

We consider a homogeneous 1D Bose gas with contact interactions and a large attractive coupling constant. This system can be realized in tight waveguides by exploiting a confinement induced resonance of the effective 1D scattering amplitude. By using the diffusion Monte Carlo method we show that, for small densities, the gaslike state is well described by a gas of hard rods. The critical density for cluster formation is estimated using the variational Monte Carlo method. The behavior of the correlation functions and of the frequency of the lowest breathing mode for harmonically trapped systems shows that the gas is more strongly correlated than in the Tonks-Girardeau regime.

• OSTI ID: 20699526
• Journal Information: Physical Review Letters, Vol. 95, Issue 19; Other Information: DOI: 10.1103/PhysRevLett.95.190407; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BOSE-EINSTEIN GAS
BOSONS
CONFINEMENT
CORRELATION FUNCTIONS
COUPLING CONSTANTS
MONTE CARLO METHOD
ONE-DIMENSIONAL CALCULATIONS
RESONANCE
SCATTERING AMPLITUDES
TRAPPING
VARIATIONAL METHODS
WAVEGUIDES