Vortex-core structure in neutral fermion superfluids with population imbalance.

@article{Takahashi2006VortexcoreSI,
  title={Vortex-core structure in neutral fermion superfluids with population imbalance.},
  author={Minoru Takahashi and Takeshi Mizushima and Masanori Ichioka and Kazushige Machida},
  journal={Physical review letters},
  year={2006},
  volume={97 18},
  pages={
          180407
        }
}
Quantized vortex-core structure is theoretically investigated in fermion superfluids with population imbalance for two atom species of neutral atom clouds near a Feshbach resonance. In contrast with the vortex core in balance case where the quantum depletion makes a vortex visible through the density profile measurement, the vortex core is filled in and becomes less visible because the quantized discrete bound states are occupied exclusively by the majority species. Yet it is shown that the… 

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References

SHOWING 1-10 OF 28 REFERENCES

Fermionic Superfluidity with Imbalanced Spin Populations

The superfluidity regime was established in a two-state mixture of ultracold fermionic atoms with imbalanced state populations and the quantum phase transition to the normal state was characterized, known as the Pauli limit of superfluidity.

Low-Lying Quasiparticle Excitations around a Vortex Core in Quantum Limit

Focusing on a quantum-limit behavior, we study a single vortex in a clean s-wave type-II superconductor by self-consistently solving the Bogoliubov-de Gennes equation. The discrete energy levels of

Structure of a quantized vortex near the BCS-BEC crossover in an atomic Fermi gas.

It is predicted that the matter density depletion and the discrete core levels are detectable in the vicinity of the BCS-Bose-Einstein condensation crossover point.

Microscopic structure of a vortex line in a dilute superfluid fermi gas.

Comparison of the numerical results with analytical expressions clearly indicates that the energy of the vortex is governed by the zero-temperature BCS coherence length.

Observation of Vortex Lattices in Bose-Einstein Condensates

The observation of dislocations, irregular structure, and dynamics indicates that gaseous Bose-Einstein condensates may be a model system for the study of vortex matter.

Generic phase diagram of Fermion superfluids with population imbalance.

It is shown by microscopic calculations for trapped imbalanced Fermi superfluids that the gap function always has sign changes, i.e., the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO)-like state, up to a

Strongly interacting Fermi gases with density imbalance.

It is shown how radio-frequency spectroscopy reflects the phase separation, and can provide direct evidence of the FFLO-type oscillations via observing the nodes of the order parameter.

Vortex state in a strongly coupled dilute atomic fermionic superfluid.

We show that in a dilute fermionic superfluid, when the fermions interact with an infinite scattering length, a vortex state is characterized by a strong density depletion along the vortex core. This

Relation between Vortex Core Charge and Vortex Bound States

Spatially inhomogeneous electron distribution around a single vortex is discussed on the basis of the Bogoliubov-de Gennes theory. The spatial structure and temperature dependence of the electron

Pairing and Phase Separation in a Polarized Fermi Gas

We report the observation of pairing in a gas of atomic fermions with unequal numbers of two components. Beyond a critical polarization, the gas separates into a phase that is consistent with a