论文标题
定期驱动的热偶极气的线性响应
Linear Response of a Periodically Driven Thermal Dipolar Gas
论文作者
论文摘要
我们研究了圆柱对称的谐波陷阱中$^{164} $ dy原子的超速，非分类偶极气的非平衡动力学。为此，我们研究气体的正常模式和线性响应，当时是通过定期调制的方式驱动对陷阱轴向频率的。我们发现，由于原子的差分横截面中的各向异性，气体的共振响应在很大程度上取决于偶极对准轴。我们采用平均方法以及数值蒙特卡洛方法的使用进行分析。一个惊人的结果是，某些称为“熔化模式”的正常模式，是在各向异性过平衡构型中启动的，在不振荡的情况下放松至平衡。
We study the nonequilibrium dynamics of an ultracold, non-degenerate dipolar gas of $^{164}$Dy atoms in a cylindrically symmetric harmonic trap. To do so, we investigate the normal modes and linear response of the gas when driven by means of periodic modulations to the trap axial-frequency. We find that the resonant response of the gas depends strongly on the dipole alignment axis, owing to anisotropies in the differential cross section of the atoms. We employ the use of the method of averages as well as numerical Monte Carlo methods for our analysis. A striking result is that certain normal modes, termed "melting modes", initiated in an anisotropic out-of-equilibrium configuration, relax to equilibrium without oscillating.
