Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Journal of Low Temperature Physics

Switching and Self-Trapping of Two Coupled Bose–Einstein Condensates in Trap Potentials with a Localized Impurity

Hong Li, Yongshan Cheng, Dexiu Huang

Published Jul 1, 2005• 8 citations
Publisher
DOI
10.1007/s10909-005-6009-2

Related papers

Switching and self-trapping effects on three coupled Bose–Einstein condensate solitons

Hong Li, Dongfei Wang, Yongshan Cheng

Chaos Solitons & Fractals•May 9, 2006•3 citations

Strong-Coupling Polarons in Dilute Gas Bose-Einstein Condensates

Fernando Cucchietti, Eddy Timmermans

A neutral impurity atom immersed in a dilute Bose-Einstein condensate (BEC) can have a bound ground state in which the impurity is self-localized. In this polaronlike state, the impurity distorts the density of the surrounding BEC, thereby creating the self-trapping potential minimum. We describe the self-localization in a strong-coupling approach.

arXiv:cond-mat/0601228•Physical Review Letters•Jun 1, 2006•212 citations

Dynamical stabilization of self-trapping of two weakly coupled Bose–Einstein condensates

Qiongtao Xie

Physics Letters A•Mar 1, 2009•3 citations

A distinguishable single excited-impurity in a Bose–Einstein condensate

Javed Akram

Abstract We investigate the properties of a distinguishable single excited state impurity pinned in the center of a trapped Bose–Einstein condensate in a one-dimensional harmonic trapping potential by changing the bare mass of the impurity and its interspecies interaction strength with the Bose–Einstein condensate. We model our system by using two coupled differential equations for the condensate and the single excited-impurity wave function, which we solve numerically. For equilibrium, we find that an excited-impurity induces two bumps or dips on the condensate for the attractive- or repulsive-interspecies coupling strengths, respectively. Afterwards, we show that the excited-impurity induced imprint upon the condensate wave function remains present during a time-of-flight expansion after having switched off the harmonic confinement. We also investigate shock-waves or gray-solitons by switching off the interspecies coupling strength in the presence of harmonic trapping potential. During this process, we found that the generation of gray bi-soliton or gray quad-solitons (four-solitons) depend on the bare mass of the excited-impurity in a harmonic trap.

arXiv:1802.01897•Laser Physics Letters•Jan 5, 2018•5 citations

Self-trapping of impurities in Bose-Einstein condensates: Strong attractive and repulsive coupling

M. Bruderer, W. Bao, D. Jaksch

We study the interaction-induced localization —the so-called self-trapping— of a neutral impurity atom immersed in a homogeneous Bose-Einstein condensate (BEC). Based on a Hartree description of the BEC we show that —unlike repulsive impurities— attractive impurities have a singular ground state in 3d and shrink to a point-like state in 2d as the coupling approaches a critical value β ⋆ . Moreover, we find that the density of the BEC increases markedly in the vicinity of attractive impurities in 1d and 2d, which strongly enhances inelastic collisions between atoms in the BEC. These collisions result in a loss of BEC atoms and possibly of the localized impurity itself.

arXiv:0801.4000•Europhysics Letters (EPL)•Apr 16, 2008•102 citations

Dynamics of impurities and trapped Bose-Einstein Condensates

R. G. Lena

•Jan 1, 2020•0 citations
Abstract We investigate the properties of a distinguishable single excited state impurity pinned in the center of a trapped Bose–Einstein condensate in a one-dimensional harmonic trapping potential by changing the bare mass of the impurity and its interspecies interaction strength with the Bose–Einstein condensate. We model our system by using two coupled differential equations for the condensate and the single excited-impurity wave function, which we solve numerically. For equilibrium, we find that an excited-impurity induces two bumps or dips on the condensate for the attractive- or repulsive-interspecies coupling strengths, respectively. Afterwards, we show that the excited-impurity induced imprint upon the condensate wave function remains present during a time-of-flight expansion after having switched off the harmonic confinement. We also investigate shock-waves or gray-solitons by switching off the interspecies coupling strength in the presence of harmonic trapping potential. During this process, we found that the generation of gray bi-soliton or gray quad-solitons (four-solitons) depend on the bare mass of the excited-impurity in a harmonic trap.
We study the interaction-induced localization —the so-called self-trapping— of a neutral impurity atom immersed in a homogeneous Bose-Einstein condensate (BEC). Based on a Hartree description of the BEC we show that —unlike repulsive impurities— attractive impurities have a singular ground state in 3d and shrink to a point-like state in 2d as the coupling approaches a critical value β ⋆ . Moreover, we find that the density of the BEC increases markedly in the vicinity of attractive impurities in 1d and 2d, which strongly enhances inelastic collisions between atoms in the BEC. These collisions result in a loss of BEC atoms and possibly of the localized impurity itself.