High-fidelity measurement and quantum feedback control in circuit QED (10 pages)
High-fidelity measurement and quantum feedback control in circuit QED (10 pages)
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DOI：
10.1103/physreva.72.062327
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发表时间：
2005-08
影响因子：
2.9
通讯作者：
M. Sarovar;H. Goan;T. Spiller;G. Milburn
中科院分区：
文献类型：
--
作者：
M. Sarovar;H. Goan;T. Spiller;G. Milburn
电路QED是一种很有前途的固态量子计算体系结构。它也有很好的潜力作为一个平台，量子控制，特别是量子反馈控制实验。然而，目前的电路QED测量方案效率低，单次测量的信噪比低。这种测量的低质量使得反馈的实现变得困难，在这里，我们提出了两种方案，用于电路QED架构中的测量，可以显着提高信噪比，并可能实现量子限制测量。这样的测量将使量子反馈协议的实施，我们说明了这与一个简单的纠缠稳定方案。
Circuit QED is a promising solid-state quantum computing architecture. It also has excellent potential as a platform for quantum control-especially quantum feedback control-experiments. However, the current scheme for measurement in circuit QED is low efficiency and has low signal-to-noise ratio for single-shot measurements. The low quality of this measurement makes the implementation of feedback difficult, and here we propose two schemes for measurement in circuit QED architectures that can significantly improve signal-to-noise ratio and potentially achieve quantum-limited measurement. Such measurements would enable the implementation of quantum feedback protocols and we illustrate this with a simple entanglement-stabilization scheme.