Engineering superfluidity in Bose-Fermi mixtures of ultracold atoms

Journal Article · Tue Nov 15 00:00:00 EST 2005 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.72.0· OSTI ID:20786431

Wang, D -W ^[1]; Lukin, M D; Demler, E ^[2]

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1. Department of Physics, National Tsing-Hua University, Hsinchu, Taiwan 300 (China)
2. Physics Department, Harvard University, Cambridge, Massachusetts 02138 (United States)

We investigate many-body phase diagrams of atomic boson-fermion mixtures loaded in the two-dimensional optical lattice. Bosons mediate an attractive, finite-range interaction between fermions, leading to fermion pairing phases of different orbital symmetries. Specifically, we show that by properly tuning atomic and lattice parameters it is possible to create superfluids with s-, p-, and d-wave pairing symmetry as well as spin and charge density wave phases. These phases and their stability are analyzed within the mean-field approximation for systems of {sup 40}K-{sup 87}Rb and {sup 40}K-{sup 23}Na mixtures. For the experimentally accessible regime of parameters, superfluids with unconventional fermion pairing have transition temperature around a percent of the Fermi energy.

• OSTI ID: 20786431
• Journal Information: Physical Review. A, Vol. 72, Issue 5; Other Information: DOI: 10.1103/PhysRevA.72.051604; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
APPROXIMATIONS
ATOMS
BOSONS
CHARGE DENSITY
D WAVES
FERMI LEVEL
FERMIONS
FINITE-RANGE INTERACTIONS
LATTICE PARAMETERS
MANY-BODY PROBLEM
MEAN-FIELD THEORY
MIXTURES
PHASE DIAGRAMS
POTASSIUM 40
RUBIDIUM 87
SODIUM 23
SPIN
SUPERCONDUCTIVITY
SUPERFLUIDITY
SYMMETRY
TRANSITION TEMPERATURE
TWO-DIMENSIONAL CALCULATIONS