A mixture of Bose and Fermi superfluids.

Observation of two-species vortex lattices in a mixture of mass-imbalance Bose and Fermi superfluids

Sound propagation in coexistent Bose and Fermi superfluids in aerogel.

We report the first observation of longitudinal sound propagation in three dimensionally distributed Bose and Fermi superfluids in an acoustic investigation of phase separated 3He-4He mixtures confined to aerogel. At mK temperatures, this inhomogeneous system exhibits simultaneous 3He and 4He superfluidity leading to two "slow modes" along with the conventional sound mode. We also infer the sup...

Ultracold heteronuclear molecules and ferroelectric superfluids.

We analyze the possibility of a ferroelectric transition in heteronuclear molecules consisting of Bose-Bose, Bose-Fermi, or Fermi-Fermi atom pairs. This transition is characterized by the appearance of a spontaneous electric polarization below a critical temperature. We discuss the existence of a ferroelectric Fermi liquid phase for Fermi molecules and the existence of a ferroelectric superflui...

The Hydrodynamic Equations of Superfluid Mixtures in Magnetic Traps

The hydrodynamics equations of binary mixtures of Bose gases, Fermi gases, and mixtures of Bose and Fermi gases in the presence of external potentials are derived. These equations can be applied to current experiments on mixtures of atomic gases confined in magnetic traps. The recent discoveries of Bose-Einstein condensation of atomic gases [1–3] have generated much interest in studying dilute ...

Bright and gap solitons and vortex formation in a superfluid Bose-Fermi mixture

Starting from a Lagrangian density of a superfluid Bose-Fermi mixture we derive a coupled set of nonlinear Schrödinger equations for the system. In the absense of interspecies Bose-Fermi interaction the Bose component satisfies a standard Gross-Pitaevskii equation, whereas the Fermi component satisfies a Ginzburg-Landau-type equation suitable for the Fermi superfluid. To study dynamics we use t...