Quantum Bayesian approach to circuit QED measurement
Quantum Bayesian approach to circuit QED measurement
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DOI:
10.1093/acprof:oso/9780199681181.003.0017
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发表时间:
2011-11
期刊:
影响因子:
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通讯作者:
A. Korotkov
中科院分区:
文献类型:
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作者:
A. Korotkov
Author(s): Korotkov, Alexander N | Abstract: We present a simple formalism describing evolution of a qubit in the process of its measurement in a circuit QED setup. When a phase-sensitive amplifier is used, the evolution depends on only one output quadrature, and the formalism is the same as for a broadband setup. When a phase-preserving amplifier is used, the qubit evolution depends on two output quadratures. In both cases a perfect monitoring of the qubit state and therefore a perfect quantum feedback is possible.