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Seminars & Lectures

* TITLE

Fragmented Condensates from the Many-Body Physics of Dilute Ultracold Bose Gases

* SPEAKERS

Name	Affiliation	E-mail
Prof. Uwe R. Fischer	Seoul National Univ.	Prof. Gentaro Watanabe (APCTP) gentaro_watanabe(at)apctp.org

* HOST(Applicant)

Name	Affiliation	E-mail
-

* DATE / TIME

2011-05-12, 11am

* PLACE

503 Condference room, APCTP Headquarters, Pohang, Korea

* ABSTRACT

We investigate whether the many-body states of bosons in a generalized two-mode model with localized inhomogeneous single-particle orbitals and anisotropic long-range interactions are coherent (single condensate) or fragmented condensate states. It is demonstrated that ground- state fragmentation can take place for a repulsive Bose gas in a single trap, counter
to expectations from the homogeneous continuum. It is also shown that for a suciently rapid dynamical quantum phase transition from the coherent to the fragmented side, the ground-state fragmentation can be suppressed, and a pair-condensate of repulsive bosons emerges.

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