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arXiv 1302.5147cond-mat.mes-hallquant-ph
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超导电路中的部分测量反action和非经典弱值

Partial-measurement back-action and non-classical weak values in a superconducting circuit

J. P. Groen, D. Ristè, L. Tornberg, J. Cramer, P. C. de Groot, T. Picot, G. Johansson, L. DiCarlo

摘要:

在电路量子电动力学中,我们通过与辅助量子比特的相互作用实现了对transmon量子比特的间接部分测量,并通过专用的读出谐振腔实现了投影辅助测量。对相互作用和辅助测量基础的精确控制允许定制测量强度和操作者。测量强度和量子比特反作用之间的折衷是通过不同基的辅助测量对量子比特拉比振荡的扭曲来表征的。结合部分和投影量子比特测量,我们提供了一个非经典的弱值和违反Leggett-Garg不等式之间的对应关系的固态演示。

英文摘要:

We realize indirect partial measurement of a transmon qubit in circuit quantum electrodynamics by interaction with an ancilla qubit and projective ancilla measurement with a dedicated readout resonator. Accurate control of the interaction and ancilla measurement basis allows tailoring the measurement strength and operator. The tradeoff between measurement strength and qubit back-action is characterized through the distortion of a qubit Rabi oscillation imposed by ancilla measurement in different bases. Combining partial and projective qubit measurements, we provide the solid-state demonstration of the correspondence between a non-classical weak value and the violation of a Leggett-Garg inequality.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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