Many-body quantum coherence and interaction blockade in Josephson-linked Bose-Einstein condensates

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dc.creatorLee, Chaohong
dc.creatorFu, Libin
dc.creatorKivshar, Yuri S.
dc.date2007-08-02
dc.date2008-02-01
dc.date.accessioned2026-07-07T09:26:45Z
dc.date.available2026-07-07T09:26:45Z
dc.descriptionWe study many-body quantum coherence and interaction blockade in two Josephson-linked Bose-Einstein condensates. We introduce universal operators for characterizing many-body coherence without limitations on the system symmetry and total particle number $N$. We reproduce the results for both coherence fluctuations and number squeezing in {\em symmetric} systems of large $N$, and reveal several peculiar phenomena that may occur in {\em asymmetric} systems and systems of small $N$. For asymmetric systems, we show that, due to an interplay between asymmetry and inter-particle interaction, the coherence fluctuations are suppressed dramatically when $|E_{C}/E_{J}|\ll 1$, and both {\it resonant tunneling} and {\it interaction blockade} take place for large values of $|E_{C}/E_{J}|$, where $E_C$ and $E_J$ are the interaction and tunneling energies, respectively. We emphasize that the resonant tunneling and interaction blockade may allow creating single-atom devices with promising technology applications. We demonstrate that for the systems at finite temperatures the formation of self-trapped states causes an anomalous behavior.
dc.description6 pages, 5 figures, accepted for publication in EPL (Europhysics Letters)
dc.identifierhttps://arxiv.org/abs/0708.0253
dc.identifierhttp://arxiv.org/abs/0708.0253
dc.identifierEPL, 81 (2008) 60006
dc.identifierdoi:10.1209/0295-5075/81/60006
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/156861
dc.subjectQuantum Physics
dc.titleMany-body quantum coherence and interaction blockade in Josephson-linked Bose-Einstein condensates
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