Physics – Condensed Matter – Quantum Gases
Scientific paper
2009-12-11
Phys. Rev. A 82, 043613 (2010)
Physics
Condensed Matter
Quantum Gases
5 pages, 5 figures
Scientific paper
10.1103/PhysRevA.82.043613
We study a 1D Fermi gas with attractive short range-interactions in a disordered potential by the density matrix renormalization group (DMRG) technique. This setting can be implemented experimentally by using cold atom techniques. We identify a region of parameters for which disorder enhances the superfluid state. As disorder is further increased, global superfluidity eventually breaks down. However this transition occurs before the transition to the insulator state takes place. This suggests the existence of an intermediate metallic `pseudogap' phase characterized by strong pairing but no quasi long-range order.
Garcia-Garcia Antonio M.
Tezuka Masaki
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