89 research outputs found
LOFF and breached pairing with cold atoms
We investigate here the Cooper pairing of fermionic atoms with mismatched
fermi surfaces using a variational construct for the ground state. We determine
the state for different values of the mismatch of chemical potential for weak
as well as strong coupling regimes including the BCS BEC cross over region. We
consider Cooper pairing with both zero and finite net momentum. Within the
variational approximation for the ground state and comparing the thermodynamic
potentials, we show that (i) the LOFF phase is stable in the weak coupling
regime, (ii) the LOFF window is maximum on the BEC side near the Feshbach
resonance and (iii) the existence of stable gapless states with a single fermi
surface for negative average chemical potential on the BEC side of the Feshbach
resonance.Comment: 14 pages including 10 figures, Some figures redrawn with more data
points, more references added, few sentences added in discussions, version to
appear in Eur. Phys. Journal
Kinetics of Phase Transitions in Quark Matter
We study the kinetics of chiral transitions in quark matter using a
phenomenological framework (Ginzburg-Landau model). We focus on the effect of
inertial terms on the coarsening dynamics subsequent to a quench from the
massless quark phase to the massive quark phase. The domain growth process
shows a crossover from a fast inertial regime [with ] to a diffusive Cahn-Allen regime [with ].Comment: 17 pages with 4 figures. Published in Euro Physics Letters (EPL).
arXiv admin note: substantial text overlap with arXiv:1209.6137,
arXiv:1101.050
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