【摘要】 研究了二维不对称两组分费米气体在零温时的相和相变,划分出不同极化率下正常相和Sarma相的区域.通过能隙和化学势在BCS-BEC渡越过程中的不连续性证明了量子拓扑相变的存在,并着重讨论了不同的配对质量对相变的影响,最后给出了相应的相图.更多还原

【Abstract】 We investigate the superfluid phase and phase transition in two dimensions at zero temperature for asymmetric Fermi gas and the regions corresponding to normal and Sarma phase for different polarization are identified.The existence of quantum topological phase transition by is proved by varying energy gap and chemical potential in BCS-BEC crossover.The effect of quantum phase transition with different mass ratio is discussed and the topological phase diagram in this region is given.更多还原