Abstract We consider a hybrid system of two interacting double quantum dots coupled to a single-mode microwave resonator, and it is demonstrated that the preparation of qubit–qubit entangled states at the steady-state mediated either by real or virtual photons is feasible when the resonator operates in an over-coupling regime. For that purpose, we perform a comprehensive analysis of the degree of entanglement in the system based on entanglement quantifiers such as the concurrence criterion and the reduced density matrix of the quantum state. In particular, our simulations take into account the current experimental scenario, and special attention is given to the reflection coefficient since it is experimentally accessible. Our findings reveal that when the two qubits energies are close to the resonance, the reflection coefficient becomes unequivocally in a witness of entanglement in the system. Our results pave the way for the experimental that desire to achieve entanglement control in the short- and long-range interactions among qubits.

中文翻译：

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由微波光子介导的两个固态量子位之间的纠缠生成

摘要 我们考虑了耦合到单模微波谐振器的两个相互作用的双量子点的混合系统，并证明了在由实光子或虚光子介导的稳态下制备量子比特 - 量子比特纠缠态是可行的，当谐振器在过耦合机制下工作。为此，我们基于纠缠量词（例如并发准则和量子态的约简密度矩阵）对系统中的纠缠度进行了综合分析。特别是，我们的模拟考虑了当前的实验场景，并且特别注意反射系数，因为它可以通过实验获得。我们的研究结果表明，当两个量子位能量接近共振时，反射系数在系统纠缠的见证中变得毫不含糊。我们的结果为希望在量子位之间的短程和长程相互作用中实现纠缠控制的实验铺平了道路。