Abstract

We have theoretically investigated an optomechanical system and presented the scenario of significantly enhanced bipartite photon–phonon entanglement for two qubits coupled to the single mode of the cavity. The results are compared with the one qubit case for reference. The tripartite atom–photon–phonon interaction is considered as only three-body resonant interaction, while the two-body actions are ignored under some potential approximations. Furthermore, we have studied the phenomenon of hyperradiance in which the well-known Dicke superradiant ( \(N^2\) scaling law) can be surpassed due to the inter-atomic correlations. Jointly, a parameter regime is explored to observe the entanglement of photon–phonon pairs and their hyperradiance simultaneously. As it is important to show that the generation of photons and phonons is antibunched, the equal time second-order correlation function \(g^{(2)}(0)\) is characterized as witness. This system can be realized in Circuit Cavity Quantum Electrodynamics (CCQED) in which the direct coupling of the atom and mechanical resonator is possible.

中文翻译：

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混合光机系统中伴随增强纠缠的超辐射的观察

摘要

我们从理论上研究了光机械系统，并提出了耦合到腔的单模的两个量子位显着增强的二分光子-声子纠缠的场景。结果与单量子位情况进行比较以供参考。原子-光子-声子三方相互作用仅被认为是三体共振相互作用，而在某些潜在近似下，二体作用被忽略。此外，我们还研究了超辐射现象，其中由于原子间的相关性，著名的迪克超辐射（\(N^2\)标度定律）可以被超越。共同探索了一种参数机制来同时观察光子-声子对的纠缠及其超辐射。由于证明光子和声子的产生是反聚束的很重要，因此等时间二阶相关函数\(g^{(2)}(0)\)被表征为证据。该系统可以在电路腔量子电动力学（CCQED）中实现，其中原子和机械谐振器的直接耦合是可能的。