Stabilizing two-qubit entanglement by mimicking a squeezed environment
Stabilizing two-qubit entanglement by mimicking a squeezed environment
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DOI：
10.1103/physrevresearch.4.023010
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发表时间：
2022-04-05
影响因子：
4.2
通讯作者：
Clerk, A. A.
中科院分区：
文献类型：
--
作者：
Govia, L. C. G.;Lingenfelter, A.;Clerk, A. A.
众所周知，量子比特在压缩真空环境中表现出许多奇异的现象，包括耗散纠缠稳定化。在这里，我们表明，这些效应只需要激发和衰减过程之间的干扰，可以忠实地模仿，而不使用非经典光，使用一个简单的经典时间调制。我们提出了利用这种想法来稳定通过传输线或波导耦合的两个远程量子比特之间的纠缠的方案，其中量子比特-波导耦合被调制，或者量子比特被直接驱动。我们分析了这些方法对各种缺陷的弹性，并描述了纠缠稳定的速度和质量之间的权衡。我们的协议是与国家的最先进的腔QED系统兼容。
It is well known that qubits immersed in a squeezed vacuum environment exhibit many exotic phenomena, including dissipative entanglement stabilization. Here we show that these effects only require interference between excitation and decay processes, and can be faithfully mimicked without nonclassical light using a simple classical temporal modulation. We present schemes that harness this idea to stabilize entanglement between two remote qubits coupled via a transmission line or waveguide, where either the qubit-waveguide coupling is modulated, or the qubits are directly driven. We analyze the resilience of these approaches against various imperfections and also characterize the trade-off between the speed and quality of entanglement stabilization. Our protocols are compatible with state-of-the-art cavity QED systems.