包含相互作用量子比特的腔QED阵列中的孤子
Solitons in cavity-QED arrays containing interacting qubits
摘要：
我们揭示了弱耦合光腔阵列中极化子孤子解的存在性，每个光腔都包含一个相互作用的量子比特系综。在连续极限下，考虑腔场耗散和量子比特退相的影响，导出了一个有效的复Ginzburg-Landau方程。我们已经表明，诱导的非线性增强可以实现两个数量级的负相互作用强度，这意味着一个大的负量子位场失谐以及。亮孤子被发现支持扰动下，只有在上（光学）分支的极化激元，相应的群速度是通过调整相互作用强度控制。借助孤子微扰理论，我们还证明了扩散过程对这些极化激元孤子的群速度有抑制作用。
英文摘要：
We reveal the existence of polariton soliton solutions in the array of weakly coupled optical cavities, each containing an ensemble of interacting qubits. An effective complex Ginzburg-Landau equation is derived in the continuum limit taking into account the effects of cavity field dissipation and qubit dephasing. We have shown that an enhancement of the induced nonlinearity can be achieved by two order of the magnitude with a negative interaction strength which implies a large negative qubit-field detuning as well. Bright solitons are found to be supported under perturbations only in the upper (optical) branch of polaritons, for which the corresponding group velocity is controlled by tuning the interacting strength. With the help of perturbation theory for solitons, we also demonstrate that the group velocity of these polariton solitons is suppressed by the diffusion process.
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