High-temperature atomic superfluidity in lattice Bose-Fermi mixtures |
| |
Authors: | Illuminati Fabrizio Albus Alexander |
| |
Institution: | Dipartimento di Fisica, Università di Salerno, INFM--UdR di Salerno, and INFN, Sezione di Napoli--Gruppo Collegato di Salerno, Via S. Allende, I-84081 Baronissi (SA), Italy. |
| |
Abstract: | We consider atomic Bose-Fermi mixtures in optical lattices and study the superfluidity of fermionic atoms due to s-wave pairing induced by boson-fermion interactions. We prove that the induced fermion-fermion coupling is always attractive if the boson-boson on-site interaction is repulsive, and predict the existence of an enhanced BEC-BCS crossover as the strength of the lattice potential is varied. We show that for direct on-site fermion-fermion repulsion, the induced attraction can give rise to superfluidity via s-wave pairing at striking variance with the case of pure systems of fermionic atoms with direct repulsive interactions. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|