Ultracold Bose Mixtures with Spin-Dependent Fermion-Mediated Interactions
arXiv:2012.00986 · doi:10.1103/PhysRevResearch.2.043218
Abstract
We develop a functional integral formulation for binary Bose-Einstein condensates coupled to polarized fermions. We find that spin-dependent fermion-mediated interactions have dramatic effects on the properties of the binary condensates. The quasiparticle spectrum features two branches. The upper branch, which is of density nature, gets modified by the induced interactions, while the lower branch, which is of spin nature, is left intact. The ground-state phase diagram consists of stable region of miscible phases and unstable region toward phase separation. In the stable region, it is further classified by the damping of excitations of the upper branch. We show that it is possible to find region of well-defined, long-lived quasiparticle excitations by tuning relevant parameters, such as boson-fermion mass ratio, boson-fermion number density ratio, and interspecies interactions between bosons as well. We explore the effects of quantum fluctuation due to the effective potential on the binary condensates. It turns out that both the density structure factor and spin density structure factor fulfill the Feynman relation, except that the latter is immune to the fermion-mediated interactions.
arXiv comment6 pages, 3 figures. arXiv admin note: text overlap with arXiv:2007.00409
References in corpus (43)
- Many-Body Physics with Ultracold Gases
- Feshbach Resonances in Ultracold Gases
- Quantum Simulation
- Quantum information with Rydberg atoms
- The Dicke Quantum Phase Transition with a Superfluid Gas in an Optical Cavity
- An Open-System Quantum Simulator with Trapped Ions
- The dynamics of component separation in a binary mixture of Bose-Einstein condensates
- Cold atoms in cavity-generated dynamical optical potentials
- Engineered 2D Ising interactions on a trapped-ion quantum simulator with hundreds of spins
- Experimental realization of a long-range antiferromagnet in the Hubbard model with ultracold atoms
- Realizing quantum Ising models in tunable two-dimensional arrays of single Rydberg atoms
- Observing the Rosensweig instability of a quantum ferrofluid
- Phase separation of Bose-Einstein condensates
- Supersolid formation in a quantum gas breaking continuous translational symmetry
- Ultracold Dipolar Gas of Fermionic NaK Molecules in their Absolute Ground State
- Excitation of phonons in a Bose-Einstein condensate by light scattering
- Observation of antiferromagnetic correlations in the Hubbard model with ultracold atoms
- Binary Bose-Einstein Condensate Mixtures in Weakly and Strongly Segregated Phases
- Extended Bose-Hubbard Models with Ultracold Magnetic Atoms
- Homogeneous Atomic Fermi Gases
- New frontiers with quantum gases of polar molecules
- Coherent many-body spin dynamics in a long-range interacting Ising chain
- Observation of a superradiant Mott insulator in the Dicke-Hubbard model
- Tunable-range, photon-mediated atomic interactions in multimode cavity QED
- Zero-temperature phase diagram of binary boson-fermion mixtures
- Cavity Mediated Collective Spin Exchange Interactions in a Strontium Superradiant Laser
- Controlling phase separation of binary Bose-Einstein condensates via mixed-spin-channel Feshbach resonance
- Quantum depletion of a homogeneous Bose-Einstein condensate
- Fermion-Mediated Interactions Between Bosonic Atoms
- Quantum degenerate mixtures of strontium and rubidium atoms
- Structure and stability of trapped atomic boson-fermion mixtures
- Phase Separation and Dynamics of two-component Bose-Einstein condensates
- A theoretical study on the damping of collective excitations in a Bose-Einstein condensate
- Rabi flopping induces spatial demixing dynamics
- Sign-changing photon-mediated atom interactions in multimode cavity QED
- Observation of Spin Superfluidity in a Bose Gas Mixture
- Observation of spin-spin fermion-mediated interactions between ultracold bosons
- Induced interactions in a superfluid Bose-Fermi mixture
- Magnetic phase transition in a mixture of two interacting Bose gases at finite temperature
- Time-of-flight expansion of binary Bose-Einstein condensates at finite temperature
- Fermion-mediated interactions in a dilute Bose-Einstein condensate
- Hydrodynamic modes of partially condensed Bose mixtures
- Large-N approximation for single- and two-component dilute Bose gases