Stability and pairing in quasi-one-dimensional Bose-Fermi mixtures

Details Stability and pairing in quasi-one-dimensional Bose-Fermi mixtures Stability and pairing in quasi-one-dimensional Bose-Fermi mixtures

2009-01-29

arxiv.org/abs/0901.4641v2

Phys. Rev. Lett. 103, 105304 (2009)

Physics

Condensed Matter

Other Condensed Matter

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.103.105304

We consider a mixture of single-component bosonic and fermionic atoms in an array of coupled one-dimensional "tubes". For an attractive Bose-Fermi interaction, we show that the system exhibits phase separation instead of the usual collapse. Moreover, above a critical inter-tube hopping, all first-order instabilities disappear in both attractive and repulsive mixtures. The possibility of suppressing instabilities in this system suggests a route towards the realization of paired phases, including a superfluid of p-wave pairs unique to the coupled-tube system, and quantum critical phenomena.

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