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SUMMARY:Polarised Fermi Gases. - Meera Parish (University of Cambridge)
DTSTART:20091022T131500Z
DTEND:20091022T141500Z
UID:TALK19794@talks.cam.ac.uk
CONTACT:Dr Jonathan Keeling
DESCRIPTION:The two-component Fermi gas is the canonical fermionic system 
 exhibiting \npairing phenomena and superfluidity and\, as such\, has relev
 ance to a range \nof different fields in physics. Ultracold atomic gases p
 rovide an \nexceptionally clean realization of this system\, since the int
 eratomic \ninteractions and atom spin are both independently tuneable. In 
 particular\, \nwe expect rich scenarios when the populations of each spin 
 are imbalanced\, \nbecause then the pairing among fermions is frustrated. 
 Indeed\, pairing and \nsuperfluidity will be destroyed entirely beyond a c
 ritical spin \npolarisation.\n\nIn this talk\, I will discuss the behaviou
 r of this spin-polarised Fermi \nsuperfluid\, with emphasis on the current
  outstanding questions. \nSpecifically\, I will argue that non-equilibrium
  effects are the most likely \ncause of the discrepancy in the observed cr
 itical spin polarisation in \nrecent cold-atom experiments. 
LOCATION:TCM Seminar Room\, Cavendish Laboratory
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