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

Abstract

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 > Ncr . 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.

References in corpus (4)

• Energetics and structural properties of three-dimensional bosonic clusters near threshold
• Resonance States and Quantum Tunneling of Bose Einstein condensates in a 3D shallow trap
• Stability of attractive bosonic cloud with van der Waals interaction
• Pair-correlation properties and momentum distribution of finite number of interacting trapped bosons in three dimension

Cited by in corpus (4)

• Correlated many-body calculation to study characteristics of Shannon information entropy for ultracold trapped interacting bosons
• Condensate fraction and critical temperature of interacting Bose gas in anharmonic trap
• Level spacing statistics and spectral correlations in the diffuse van der Waals clusters
• Macroscopic quantum many-body tunneling of attractive Bose-Einstein condensate in anharmonic trap