We theoretically study a quantum destructive interference (QDI)-induced photon blockade in a two-qubit driven cavity quantum electrodynamics system with dipole–dipole interaction (DDI). In the absence of dipole–dipole interaction, we show that a QDI-induced photon blockade can be achieved only when the qubit resonance frequency is different from the cavity mode frequency. When DDI is introduced the condition for this photon blockade is strongly dependent upon the pump field frequency, and yet is insensitive to the qubit–cavity coupling strength. Using this tunability feature we show that the conventional energy-level-anharmonicity-induced photon blockade and this DDI-based QDI-induced photon blockade can be combined together, resulting in a hybrid system with substantially improved mean photon number and second-order correlation function. Our proposal provides a nonconventional and experimentally feasible platform for generating single photons.

中文翻译：

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具有偶极-偶极相互作用的双量子位腔 QED 系统中的混合能级非谐性和干扰诱导的光子阻塞

我们从理论上研究了具有偶极 - 偶极相互作用 (DDI) 的双量子位驱动腔量子电动力学系统中的量子相消干涉 (QDI) 诱导的光子阻塞。在没有偶极-偶极相互作用的情况下，我们表明只有当量子位共振频率不同于腔模频率时，才能实现 QDI 诱导的光子阻断。当引入 DDI 时，这种光子阻塞的条件强烈依赖于泵场频率，但对量子位 - 腔耦合强度不敏感。使用这种可调性特征，我们表明传统的能级非谐波诱导的光子阻断和这种基于 DDI 的 QDI 诱导的光子阻断可以结合在一起，从而形成一个具有显着改善的平均光子数和二阶相关函数的混合系统.