Heavy-Light Fermion Mixtures at Unitarity Export

@article{citeulike:4032790, abstract = {We investigate pairing between unequal-mass fermions in the unitary regime for a mass ratio corresponding to a 6Li-40K mixture. We show that the fully paired superfluid state is nearly independent of the mass ratio; the ground-state energy and the average light and heavy particle excitation spectrum change very little. However, in the majority light system, the polarized superfluid is close to stability compared to a phase separated state. For a majority of heavy particles, we find an energy minimum for a normal state with a ratio of \~{} 3:1 heavy to light particles. A slight increase in attraction to kF*a \~{} 2.5 renders the system unstable. A cold unpolarized system in a harmonic trap at unitarity should phase separate into three regions: a normal state with a large heavy to light ratio in the center, followed by a shell of fully paired superfluid in the middle and either a polarized superfluid or a nearly fully polarized normal state in the exterior.}, archivePrefix = {arXiv}, author = {Gezerlis, Alexandros and Gandolfi, S. and Schmidt, K. E. and Carlson, J.}, citeulike-article-id = {4032790}, citeulike-linkout-0 = {http://arxiv.org/abs/0901.3148}, citeulike-linkout-1 = {http://arxiv.org/pdf/0901.3148}, day = {20}, eprint = {0901.3148}, keywords = {carlson, fesbach, tsai}, month = {Jan}, posted-at = {2009-02-11 06:32:30}, priority = {2}, title = {Heavy-Light Fermion Mixtures at Unitarity}, url = {http://arxiv.org/abs/0901.3148}, year = {2009} }

TY - JOUR ID - citeulike:4032790 L3 - citeulike-article-id:4032790 N2 - We investigate pairing between unequal-mass fermions in the unitary regime for a mass ratio corresponding to a 6Li-40K mixture. We show that the fully paired superfluid state is nearly independent of the mass ratio; the ground-state energy and the average light and heavy particle excitation spectrum change very little. However, in the majority light system, the polarized superfluid is close to stability compared to a phase separated state. For a majority of heavy particles, we find an energy minimum for a normal state with a ratio of ~ 3:1 heavy to light particles. A slight increase in attraction to kF*a ~ 2.5 renders the system unstable. A cold unpolarized system in a harmonic trap at unitarity should phase separate into three regions: a normal state with a large heavy to light ratio in the center, followed by a shell of fully paired superfluid in the middle and either a polarized superfluid or a nearly fully polarized normal state in the exterior. TI - Heavy-Light Fermion Mixtures at Unitarity KW - carlson KW - fesbach KW - tsai AU - Gezerlis, Alexandros AU - Gandolfi, S AU - Schmidt, KE AU - Carlson, J PY - 2009/Jan/20/ UR - http://arxiv.org/abs/0901.3148 ER -