Destruction of attractive bosonic cloud due to high spatial coherence in tight trap

Journal Article · Sat Oct 15 04:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.84.043631· OSTI ID:22095422

Biswas, Anindya; Das, Tapan Kumar ^[1]; Chakrabarti, Barnali ^[2]; Salasnich, Luca ^[3]

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1. Department of Physics, University of Calcutta, 92 A.P.C. Road, Kolkata 700009 (India)
2. Instituto de Fisica, Universidade of Sao Paulo, CP 66318, 05315-970 Sao Paulo-SP (Brazil)
3. Dipartimento di Fisica ''Galileo Galilei'' and CNISM, Universita di Padova, Via Marzolo 8, IT-35122 Padova (Italy)

We study coherence of a trapped bosonic cloud with attractive finite-range interaction in a tight harmonic trap. One-body density and pair-distribution function in the ground state for different trap sizes are calculated. We also calculate healing length and the correlation length which signify the presence of high spatial coherence in a very tight trap leading to the destruction of the condensate for a fixed particle number. This is in marked variance with the usual collapse of the attractive metastable condensate when N>N{sub cr}. Thus we investigate the critical frequency and critical size of the trap for the existence of attractive Bose-Einstein condensation. The finite-range interaction gives a nonlocal effect in the effective many-body potential, and we observe a high-density stable branch besides the known metastable branch. Moreover, the new branch shows universal behavior even in the very tight trap.

• OSTI ID: 22095422
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 4 Vol. 84; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BOSE-EINSTEIN CONDENSATION
BOSONS
CONDENSATES
CRITICAL FREQUENCY
DISTRIBUTION FUNCTIONS
FINITE-RANGE INTERACTIONS
GROUND STATES
MANY-BODY PROBLEM
PARTICLES
POTENTIALS
TRAPPING