光学微腔中一维费米气的磁性关联特性

摘要

In this work we show that the superradiance of the cavity photons can give rise to a magnetic transformation for the atomic system when the quasi one-dimensional Fermi gases are coupled to an optical cavity. This magnetic transformation has a close relationship with the atomic detuning and the filling number. When the interaction between the atoms is neglected, the mean-field approximation may be used in the superradiant phase. In this approximation, we analyze the static spin structure factors of the system with different filling numbers and atomic detuning. Then we characterize the cavity photons-assisted magnetic transformation and obtain the phase diagrams which are dependent on the cavity parameters. Finally, the feasible experimental parameters of our results are also discussed.%对于准一维两组分费米气与光学微腔耦合的系统,证明了微腔光子的超辐射可以驱动原子系统的磁性转变,该磁性转变与原子的失谐以及费米子的填充数密切相关.对于无相互作用原子气,在超辐射相区内平均场近似合理.基于该近似,分析了不同的填充和失谐情况下体系的静态自旋结构因子,由此刻画出腔光子协助的磁性关联转变,并得到了依赖于微腔参数的相图.最后,对可行的实验参数做了相关讨论.