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Article overview
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Pairing Dynamics of Polar States in a Quenched p-wave Superfluid Fermi Gas | | Sukjin Yoon
; Gentaro Watanabe
; | | Date: |
30 Dec 2015 | | Abstract: | We consider polar states of a single-species superfluid Fermi gas tuned close
to a p-wave Feshbach resonance of m=0 projection in 3 dimensions and
investigate their pairing dynamics after a sudden change of interaction
strength. The time evolution of the pairing field, momentum distribution, and
pair amplitude distribution is obtained numerically within a mean-field
approach. The anisotropy of pair interaction together with the presence of the
centrifugal barrier results in different pairing dynamics compared to the
s-wave case. Depending on the initial state, quench to BCS regime results in
interconversion of atomic and resonant states, molecular and atomic states, or
BCS-paired and atomic states, via resonant state of the final Hamiltonian. This
leads to narrow oscillatory hole-burning (large depletion of momentum
occupation) inside the Fermi sea or particle-peak (large filling of momentum
occupation) at different rate depending on the polar angle from the symmetry
axis in momentum space. The frequency of decaying oscillation of the pairing
field agrees with that of oscillatory hole-burning/particle-peak on the
symmetry axis. | | Source: | arXiv, 1512.9058 | | Services: | Forum | Review | PDF | Favorites | |
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