Hydrodynamic modes of partially condensed Bose mixtures

Abstract

We generalize the Landau-Khalatnikov hydrodynamic theory for superfluid helium to two-component (binary) Bose mixtures at arbitrary temperatures. In particular, we include the spin-drag terms that correspond to viscous coupling between the clouds. Therefore, our theory not only describes the usual collective modes of the individual components, e.g., first and second sound, but also results in new collective modes, where both constituents participate. We study these modes in detail and present their dispersions using thermodynamic quantities obtained within the Popov approximation.

References in corpus (8)

• Many-Body Physics with Ultracold Gases
• Spontaneous symmetry breaking in a quenched ferromagnetic spinor Bose condensate
• Observation of Dirac Monopoles in a Synthetic Magnetic Field
• Persistent currents in spinor condensates
• Ultracold Heteronuclear Fermi-Fermi Molecules
• Spin Drag and Spin-Charge Separation in Cold Fermi Gases
• Nonperturbative thermodynamics of an interacting Bose gas
• Kinetic Model of Trapped Finite Temperature Binary Condensates

Cited by in corpus (7)

• Spin-Dipole Oscillation and Polarizability of a Binary Bose-Einstein Condensate near the Miscible-Immiscible Phase Transition
• Low-Dimensional Self-Bound Quantum Rabi-Coupled Bosonic Droplets
• Ultracold Bose Mixtures with Spin-Dependent Fermion-Mediated Interactions
• Functional renormalization for repulsive Bose-Bose mixtures at zero temperature
• Weakly-interacting Bose-Bose mixtures from the functional renormalisation group
• Nonuniversal equation of state for Rabi-coupled bosonic gases: a droplet phase
• Probing $p$-wave effects in spin-density separation of Bose mixtures with the dynamic structure factor