Nonclassical microwave radiation from the dynamical Casimir effect
Nonclassical microwave radiation from the dynamical Casimir effect
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DOI：
10.1103/physreva.87.043804
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发表时间：
2013-04-04
影响因子：
2.9
通讯作者：
Nori, Franco
中科院分区：
文献类型：
--
作者：
Johansson, J. R.;Johansson, G.;Nori, Franco
研究了在超导量子干涉器件调制和终止的超导波导中，动态Casimir效应产生的微波辐射中的量子关联。我们应用非经典性测试和评估预测的场态的纠缠。对于实际的电路参数，包括热背景噪声，结果表明，所产生的辐射可以是严格的非经典的，可以有一个可测量的模间纠缠量。如果通过实验测量，这些非经典性指标可以进一步证明这些电路中动态卡西米尔辐射的量子性质。DOI：10.1103/PhysRevA.87.043804
We investigate quantum correlations in microwave radiation produced by the dynamical Casimir effect in a superconducting waveguide terminated and modulated by a superconducting quantum interference device. We apply nonclassicality tests and evaluate the entanglement for the predicted field states. For realistic circuit parameters, including thermal background noise, the results indicate that the produced radiation can be strictly nonclassical and can have a measurable amount of intermode entanglement. If measured experimentally, these nonclassicality indicators could give further evidence of the quantum nature of the dynamical Casimir radiation in these circuits. DOI: 10.1103/PhysRevA.87.043804