Readout methods and devices for Josephson-junction-based solid-state qubits
Readout methods and devices for Josephson-junction-based solid-state qubits
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基于约瑟夫森结的固态量子位的读出方法和装置
DOI：
10.1088/0953-8984/18/21/s14
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
G. Wendin
中科院分区：
文献类型：
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作者：
Göran Johansson;L. Tornberg;V. Shumeiko;G. Wendin
讨论了基于约瑟夫森结的量子比特的测量和读出的现状。特别是，我们把注意力集中在色散低耗散技术，涉及从耦合到量子位的振荡器电路的辐射反射，允许单次确定量子位的状态。特别是，我们开发了一个形式主义描述的电荷量子比特读出测量其有效（量子）电容。为了解决这个问题，我们还给出了读出时间的显式公式。
We discuss the current situation concerning measurement and readout of Josephson-junction based qubits. In particular, we focus attention on dispersive low-dissipation techniques involving reflection of radiation from an oscillator circuit coupled to a qubit, allowing single-shot determination of the state of the qubit. In particular, we develop a formalism describing a charge qubit read out by measuring its effective (quantum) capacitance. To exemplify, we also give explicit formulas for the readout time.