Structure and stability of quasi-two-dimensional boson-fermion mixtures with vortex-antivortex superposed states
arXiv:1007.4422 · doi:10.1088/0953-4075/43/22/225302
Abstract
We investigate the equilibrium properties of a quasi-two-dimensional degenerate boson-fermion mixture (DBFM) with a bosonic vortex-antivortex superposed state (VAVSS) using a quantum-hydrodynamic model. We show that, depending on the choice of parameters, the DBFM with a VAVSS can exhibit rich phase structures. For repulsive boson-fermion (BF) interaction, the Bose-Einstein condensate (BEC) may constitute a petal-shaped "core" inside the honeycomb-like fermionic component, or a ring-shaped joint "shell" around the onion-like fermionic cloud, or multiple segregated "islands" embedded in the disc-shaped Fermi gas. For attractive BF interaction just below the threshold for collapse, an almost complete mixing between the bosonic and fermionic components is formed, where the fermionic component tends to mimic a bosonic VAVSS. The influence of an anharmonic trap on the density distributions of the DBFM with a bosonic VAVSS is discussed. In addition, a stability region for different cases of DBFM (without vortex, with a bosonic vortex, and with a bosonic VAVSS) with specific parameters is given.
8 pages,5 figures
References in corpus (19)
- Theory of ultracold Fermi gases
- Quantized Rotation of Atoms From Photons with Orbital Angular Momentum
- Direct Observation of the Superfluid Phase Transition in Ultracold Fermi Gases
- The Vortex Phase Qubit: Generating Arbitrary, Counter-Rotating, Coherent Superpositions in Bose-Einstein Condensates via Optical Angular Momentum Beams
- Role of interactions in 87Rb-40K Bose-Fermi mixtures in a 3d optical lattice
- Interaction-driven Dynamics of 40K / 87Rb Fermi-Bose Gas Mixtures in the Large Particle Number Limit
- All-Optical Formation of Quantum Degenerate Mixtures
- Sculpting the Vortex State of a Spinor BEC
- Soliton trains in Bose-Fermi mixtures
- Localized modes in arrays of boson-fermion mixtures
- Collective excitations in trapped boson-fermion mixtures: from demixing to collapse
- Arbitrary Coherent Superpositions of Quantized Vortices in Bose-Einstein Condensates from Orbital Angular Momentum Beams of Light
- Collective excitations of a Bose-Einstein condensate in an anharmonic trap
- Angular momentum exchange between coherent light and matter fields
- Finite temperature effects on the collapse of trapped Bose-Fermi mixtures
- Collisional oscillations of trapped boson-fermion mixtures approaching collapse
- Mixing-demixing transition and collapse of a vortex state in a quasi-two-dimensional boson-fermion mixture
- Stability and pairing in quasi-one-dimensional Bose-Fermi mixtures
- Two-dimensional boson-fermion mixtures