Thursday, January 17, 2008, 1:30 pm — Small seminar room, Bldg. 510
I will discuss the dynamics of a condensate of ultra-cold atomic
fermions following an abrupt change of the pairing strength. At long times the
system goes to a non-stationary steady state, which we determine exactly. Two
peculiar "dynamical phase transitions" are present. When the coupling is
decreased below a certain threshold, the order parameter vanishes exponentially
in time. In this case, the steady state of the system is a novel gapless
superfluid state. On the other hand, if the coupling is increased above a
certain critical value, the order parameter displays persistent periodic
oscillations. I will also discuss the possible signatures of the novel states
in the radio-frequency absorption spectra.
Hosted by: Robert Konik
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