Physics – Condensed Matter – Quantum Gases
Scientific paper
2010-04-22
Phys. Rev. A 82, 033613 (2010)
Physics
Condensed Matter
Quantum Gases
45 pages, 10 figures, appeared in Phys. Rev. A with minor changes
Scientific paper
10.1103/PhysRevA.82.033613
A three dimensional attractive Bose-Einstein Condensate (BEC) is expected to collapse, when the number of the particles $N$ in the ground state or the interaction strength $\lambda_0$ 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 \emph{configuration interaction} expansion we determine the spectrum of the ground (`yrast') and excited many-body states with definite total angular momentum quantum numbers $0\leqslant L\leqslant N$ and $-L\leqslant M_L\leqslant L$, and we find and examine states that survive the collapse. This opens up the possibility of realizing a metastable system with overcritical numbers of bosons in a ground state with angular momentum $L\neq0$. The multi-orbital mean-field theory predictions about the existence of fragmented metastable states with overcritical numbers of bosons are verified and elucidated at the many-body level. The descriptions of the total angular momentum within the mean-field and the many-body approaches are compared.
Alon Ofir E.
Cederbaum Lorenz S.
Streltsov Alexej I.
Tsatsos Marios C.
No associations
LandOfFree
Fragmented Many-Body states of definite angular momentum and stability of attractive 3D Condensates does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Fragmented Many-Body states of definite angular momentum and stability of attractive 3D Condensates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fragmented Many-Body states of definite angular momentum and stability of attractive 3D Condensates will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-459821