Fragmented many-body states of definite angular momentum and stability of attractive three-dimensional condensates

A three-dimensional attractive Bose-Einstein condensate is expected to collapse when the number of the particles N in the ground state or the interaction strength {lambda}{sub 0} exceeds a critical value. We study systems of different particle numbers and interaction strength and find that even if t...

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Bibliographic Details
Published in:Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2010-09, Vol.82 (3), Article 033613
Main Authors: Tsatsos, Marios C., Streltsov, Alexej I., Alon, Ofir E., Cederbaum, Lorenz S.
Format: Article
Language:English
Subjects:
ANGULAR MOMENTUM
ATOMIC AND MOLECULAR PHYSICS
BOSE-EINSTEIN CONDENSATION
BOSONS
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
CONFIGURATION INTERACTION
ENERGY LEVELS
EXCITED STATES
GROUND STATES
MANY-BODY PROBLEM
MEAN-FIELD THEORY
METASTABLE STATES
PHASE STABILITY
QUANTUM NUMBERS
STABILITY
THREE-DIMENSIONAL CALCULATIONS
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Summary:A three-dimensional attractive Bose-Einstein condensate is expected to collapse when the number of the particles N in the ground state or the interaction strength {lambda}{sub 0} exceeds a critical value. We study systems of different particle numbers and interaction strength and find that even if the overall ground state is collapsed there is a plethora of fragmented excited states that are still in the metastable region. Utilizing the configuration interaction expansion we determine the spectrum of the ground (''yrast'') and excited many-body states with definite total angular-momentum quantum numbers 0{
ISSN:1050-2947
1094-1622
DOI:10.1103/PhysRevA.82.033613