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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/50023
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- Multicomponent strongly attractive Fermi gas: a color superconductor in a one-dimensional harmonic trap
- Liu, Xia-Ji; Hu, Hui; Drummond, P. D.
- Recent advances in ultracold atomic Fermi gases make it possible to achieve a fermionic superfluid with multiple spin components. In this context, any mean-field description is expected to fail, owing to the presence of tightly bound clusters or molecules that consist of more than two particles. Here we present a detailed study of a strongly interacting multicomponent Fermi gas in a highly elongated or quasi-one-dimensional harmonic trap, which could be readily obtained in experiment. By using the exact Bethe ansatz solution and a local density approximation treatment of the harmonic trap, we investigate the equation of state of the multicomponent Fermi gas in both a homogeneous and trapped environment, as well as the density profiles and low-energy collective modes. The binding energy of multicomponent bound clusters is also given. We show that there is a peak in the collective mode frequency at the critical density for a deconfining transition to a many-body state that is analogous to the quark color superconductor state expected in neutron stars.
- Publication type
- Journal article
- Physical Review A, Vol. 77, no. 1 (2008), article no. 013622
- Publication year
- FOR Code(s)
- 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics; 0204 Condensed Matter Physics; 0205 Optical Physics
- Binding energy; Colour; Density functional theory; Electron traps; Equations of state; Fermi gas; Fermion systems; Fermionic superfluids; Harmonic analysis; Harmonic traps; Superconducting materials; Superconductivity; Superfluidity
- American Physical Society
- Publisher URL
- Copyright © 2008 The American Physical Society. Published version of this paper reproduced here in accordance with the copyright policy of the publisher.
- Full text
- Peer reviewed