Description
In this talk, I will discuss three topics. First, the FFLO
phase in one dimensional optical lattice and a direct way to
observe it as narrowing of the hopping modulation spectrum.
Second, I discuss our work on polaron-type physics in one
dimension where we can explain the results of exact
simulations by a polaron ansatz in one the weakly
interacting and by a spinless Fermion solution given by the
Bethe ansatz in the strongly interacting limit. This
corresponds to the polaron-molecule crossover in three
dimensions. Finally, I present a novel type of Josephson
effect where the components of the Cooper pair feel a
different potential (voltage), which is possible to realize
in ultracold gases. We show that this leads to
spin-asymmetric Josephson oscillations and provide an
explanation of this intriguing phenomenon which also gives
new information about the traditional Josephson effect.
Primary author
Prof.
Päivi Törmä
(Aalto University)
