Breaking the resilience of a two-dimensional Bose-Einstein condensate to fragmentation

Shachar Klaiman; Axel U.J. Lode; Alexej I. Streltsov; Lorenz S. Cederbaum; Ofir E. Alon

doi:10.1103/PhysRevA.90.043620

Breaking the resilience of a two-dimensional Bose-Einstein condensate to fragmentation

Shachar Klaiman, Axel U.J. Lode, Alexej I. Streltsov, Lorenz S. Cederbaum, Ofir E. Alon

Department of Mathematics

Research output: Contribution to journal › Article › peer-review

Abstract

A two-dimensional Bose-Einstein condensate (BEC) split by a radial potential barrier is investigated. We determine on an accurate many-body level the system's ground-state phase diagram as well as a time-dependent phase diagram of the splitting process. Whereas the ground state is condensed for a wide range of parameters, the time-dependent splitting process leads to substantial fragmentation. We demonstrate the dynamical fragmentation of a BEC despite its ground state being condensed. The results are analyzed using a mean-field model and suggest that a large manifold of low-lying fragmented excited states can significantly impact the dynamics of trapped two-dimensional BECs.

Original language	English
Article number	043620
Number of pages	6
Journal	Physical Review A - Atomic, Molecular, and Optical Physics
Volume	90
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevA.90.043620
State	Published - 20 Oct 2014

Bibliographical note

Publisher Copyright:
© 2014 American Physical Society.

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1103/PhysRevA.90.043620

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abstract = "A two-dimensional Bose-Einstein condensate (BEC) split by a radial potential barrier is investigated. We determine on an accurate many-body level the system's ground-state phase diagram as well as a time-dependent phase diagram of the splitting process. Whereas the ground state is condensed for a wide range of parameters, the time-dependent splitting process leads to substantial fragmentation. We demonstrate the dynamical fragmentation of a BEC despite its ground state being condensed. The results are analyzed using a mean-field model and suggest that a large manifold of low-lying fragmented excited states can significantly impact the dynamics of trapped two-dimensional BECs.",

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AU - Lode, Axel U.J.

AU - Streltsov, Alexej I.

AU - Cederbaum, Lorenz S.

AU - Alon, Ofir E.

PY - 2014/10/20

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AB - A two-dimensional Bose-Einstein condensate (BEC) split by a radial potential barrier is investigated. We determine on an accurate many-body level the system's ground-state phase diagram as well as a time-dependent phase diagram of the splitting process. Whereas the ground state is condensed for a wide range of parameters, the time-dependent splitting process leads to substantial fragmentation. We demonstrate the dynamical fragmentation of a BEC despite its ground state being condensed. The results are analyzed using a mean-field model and suggest that a large manifold of low-lying fragmented excited states can significantly impact the dynamics of trapped two-dimensional BECs.

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Breaking the resilience of a two-dimensional Bose-Einstein condensate to fragmentation

Abstract

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