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Seminars & Lectures

* TITLE

Some Aspects of Pairing and Condensation in Ultracold Fermionic Gases

* SPEAKERS

Name	Affiliation	E-mail
Raka Dasgupta	APCTP	rakadasg(at)apctp.org

* HOST(Applicant)

Name	Affiliation	E-mail
Gentaro Watanabe	APCTP	gentaro_watanabe(at)apctp.org

* DATE / TIME

2012-10-15, 4:00PM

* PLACE

503 Conference room, APCTP Headquarters, Pohang

* ABSTRACT

Our study dealt with cold fermions that can exhibit BCS pairing or can form bosonic molecules via Feshbach resonance and undergo Bose Einstein condensation (BEC) .
An additional three-body interaction was taken into account, which made the BCS-BEC crossover process a non-reversible one. An interesting variation in this situation was the introduction of an imbalance in the fermion number, since pairing now had to work around the fact that not all fermions of type A(one of the species) had a fermion of type B (the other species) to pair with. The consequence, as it had been pointed out in current research, could be exotic pairing states.We aimed to study static and dynamic properties of such an imbalanced system, and connect them with the attributes of the novel superfluid states. The natural dynamics of the system was probed and it was shown that the oscillation of the condensate fraction is periodic or quasi periodic, depending on the value of the Feshbach coupling.

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