Switchable bipartite and genuine tripartite entanglement via an optoelectromechanical interface

Switchable bipartite and genuine tripartite entanglement via an optoelectromechanical interface
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通过光电机械接口可切换二分纠缠和真正的三分纠缠

DOI:
10.1103/physreva.101.042320
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发表时间:
2019-10
期刊:
影响因子:
2.9
通讯作者:
Tian Lin
Tian Lin
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Jiang Cheng;Tserkis Spyros;Collins Kevin;Onoe Sho;Li Yong;Tian Lin

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可控多方纠缠是量子信息处理中的一个关键问题。在这里,我们提出了一种方案,通过光电接口在微波和光学光子之间产生可切换的二部和真正的三部纠缠,其中微波和光学腔耦合到具有可控耦合常数的机械模式。我们表明,通过将耦合常数之间的有效规范相位调整到“甜蜜点”,可以产生二部纠缠并在指定的输出光子之间切换。当选择满足阻抗匹配条件的耦合器时,二部纠缠对机械噪声和机械模式的信号损失具有鲁棒性。当测量相位从“甜蜜点”调谐时,可以产生真正的三方纠缠,并通过在输出场的正交上进行同差测量来验证。我们的结果可以导致在不同频率下运行的混合量子系统中实现可控和鲁棒的多部纠缠。
Controllable multipartite entanglement is a crucial element in quantum information processing. Here we present a scheme that generates switchable bipartite and genuine tripartite entanglement between microwave and optical photons via an optoelectromechanical interface, where microwave and optical cavities are coupled to a mechanical mode with controllable coupling constants. We show that by tuning an effective gauge phase between the coupling constants to the "sweet spots", bipartite entanglement can be generated and switched between designated output photons. The bipartite entanglement is robust against the mechanical noise and the signal loss to the mechanical mode when the couplings are chosen to satisfy the impedance matching condition. When the gauge phase is tuned away from the "sweet spots", genuine tripartite entanglement can be generated and verified with homodyne measurement on the quadratures of the output fields. Our result can lead to the implementation of controllable and robust multipartite entanglement in hybrid quantum systems operated in distinctively different frequencies.
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