论文标题
在两级状态的腔耦合合奏中驱动的正交和自旋挤压
Driven quadrature and spin squeezing in a cavity-coupled ensemble of two-level states
论文作者
论文摘要
理论上探索了在腔耦合的集合中挤压的正交的大小，该集合是使用相干离轴场连续驱动的。在数值上，使用从dicke hamiltonian得出的一组截断的动作方程式，稳态的正交正常挤压在数值上计算为接近-3 dB的限制，而频率修饰的正交挤压挤压方法是-14 db的限制，即-14 db的限制为-14 db，在缺乏纯dephass的情况下，并被纯化而造成了纯化的尺寸。纯dephasing对稳态正交挤压的影响被证明可以通过增加驾驶场的失谐来减轻，而频率调节的挤压仅在累积耦合和驱动速率的状态下被屏蔽，而累积的耦合速度和驱动速度超过了纯dephasing率。还计算自旋方纠缠同时发生在较弱的频率调节的正交挤压中。
The generated magnitude of quadrature squeezing in a cavity-coupled ensemble, which is continuously driven using a coherent off-axis field, is theoretically explored. Using a truncated set of equations-of-motion derived from a Dicke Hamiltonian, steady-state quadrature squeezing of the cavity field is numerically calculated to approach a limit of -3 dB, while frequency-modulated quadrature squeezing approaches a limit of -14 dB, in the absence of pure-dephasing, and as a function of the ensemble's size and detuning. The impact of pure-dephasing on steady-state quadrature squeezing is shown to be mitigated by increased detuning of the driving field, while frequency-modulated squeezing is only shielded in a regime where the cumulative coupling and driving rates are in excess of the pure-dephasing rate. Spin-squeezed entanglement is also calculated to occur simultaneously with weakly-driven frequency-modulated quadrature squeezing.
