Energy Spectrum of Fermions in a Rotating Boson-Fermion Mixture

Journal Article · Thu Sep 07 04:00:00 EDT 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2354606· OSTI ID:20884856

Kanamoto, Rina; Tsubota, Makoto ^[1]

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1. Department of Physics, Osaka City University, Osaka 558-8585 (Japan)

We investigate single-particle quantum states of degenerate fermions, which interact repulsively with a Bose-Einstein condensate in a rotating harmonic trap. The boson-fermion coupling partially lifts the degeneracies of the fermionic energy spectrum in a slow rotating regime, and causes level discontinuities of occupied states upon the formation of quantized vortices in the condensate. In a fast rotating regime, the Fermi energy is located in a highly quasidegenerate single band, and hence the lowest-Landau-level description is applicable. The probability of finding fermions on the vortex cores is significantly enhanced when the numbers of vortices and fermions are comparable. However, increasing the number of fermions expands the fermionic cloud outward, and phase separation occurs due to the Pauli pressure while the shape of the bosonic condensate remains unchanged.

• OSTI ID: 20884856
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 850; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BOSE-EINSTEIN CONDENSATION
BOSONS
ENERGY SPECTRA
FERMI LEVEL
FERMIONS
MIXTURES
PROBABILITY
TRAPS
VORTICES