Superfluid shells for trapped fermions with mass and population imbalance

@article{Lin2006SuperfluidSF,
  title={Superfluid shells for trapped fermions with mass and population imbalance},
  author={Guin-Dar Lin and Wei Yi and Luming Duan},
  journal={Physical Review A},
  year={2006},
  volume={74},
  pages={031604}
}
We map out the phase diagram of strongly interacting fermions in a potential trap with mass and population imbalance between the two components. As a unique feature distinctively different from the equal-mass case, we show that the superfluid here forms a shell structure which is not simply connected in space. Different types of normal states occupy the trap regions inside and outside this superfluid shell. We calculate the atomic density profiles, which provide an experimental signature for… 

Figures from this paper

Unusual Destruction and Enhancement of Superfluidity of Atomic Fermi Gases by Population Imbalance in a One-Dimensional Optical Lattice
We study the superfluid behavior of a population imbalanced ultracold atomic Fermi gases with a short range attractive interaction in a one-dimensional (1D) optical lattice, using a pairing
Low-Temperature Properties of the Fermionic Mixtures with Mass Imbalance in Optical Lattice
We study the attractive Hubbard model with mass imbalance to clarify the low-temperature properties of fermionic mixtures in an optical lattice. By combining dynamical mean-field theory with
Beyond-mean-field description of a trapped unitary Fermi gas with mass and population imbalance
A detailed description is given of the phase diagram for a two-component unitary Fermi gas with mass and population imbalance, for both homogeneous and trapped systems. This aims at providing
Dynamical properties of a few mass-imbalanced ultra-cold fermions confined in a double-well potential
A comprehensive analysis of the exact unitary dynamics of two-component mass-imbalanced fermions in a one-dimensional double-well potential is accomplished by considering the total number of
Phase diagram of asymmetric Fermi gas across Feshbach resonance
We study the phase diagram of the dilute two-component Fermi gas at zero temperature as a function of the polarization and coupling strength. We map out the detailed phase separations between
Temperature effects in a Fermi gas with population imbalance
We investigate temperature effects in a Fermi gas with imbalanced spin populations. From the general expression of the thermal gap equation we find, in weak coupling limit, an analytical expression
Competing superfluid and density-wave ground-states of fermionic mixtures with mass imbalance in optical lattices
The remarkable advances in handling ultra-cold atomic gases have given birth to the new field of “condensed matter physics with light and atoms”. Cold atoms in optical lattices, with tunable and
Fermi Mixtures: Effects of Engineered Confinements
In this thesis we first review the theory of the normal state of the unitary Fermi gas at T = 0 and the main properties of the normal-to-superfluid transition. Then we study the trapped gas under
Mass-Imbalanced Superconductivity in Effective Two-Channel Kondo Lattice
We propose that mass-imbalanced superconductivity is realized in an effective two-channel Kondo lattice, and its characteristic property appears in electromagnetic responses such as the Meissner
Thermal transitions, pseudogap behavior, and BCS-BEC crossover in Fermi-Fermi mixtures
We study the mass imbalanced Fermi-Fermi mixture within the framework of a two-dimensional lattice fermion model. Based on the thermodynamic and species dependent quasiparticle behavior we map out
...
...