Double-dot interferometer for quantum measurement of Majorana qubits and stabilizers
Double-dot interferometer for quantum measurement of Majorana qubits and stabilizers
复制标题
用于马约拉纳量子位和稳定器量子测量的双点干涉仪
DOI：
10.1088/1674-1056/abc549
复制
发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Xin-Qi Li
中科院分区：
文献类型：
--
作者：
Kai Zhou;Cheng Zhang;Lupei Qin;Xin-Qi Li
基于Majorana量子比特和表面码稳定器的量子测量需要，我们分析了双点干涉仪在环境噪声影响下的性能.双点干涉仪的设计允许在主方程方法内解释通过Majorana岛的点之间的多重隧穿过程.在共隧穿机制下，导致点之间的Majorana介导的有效耦合，主方程方法使我们能够获得测量电流的解析解.测量质量的特征在于测量信号的可见性等品质因数，测量质量是关于不寻常的退相干效应而不是“哪条路径”的退相.这项工作中所获得的结果预计将是有用的Majorana量子比特和稳定器测量的未来实验.
Motivated by the need of quantum measurement of Majorana qubits and surface-code stabilizers,we analyze the performance of a double-dot interferometer under the influence of environment noise.The double-dot setup design allows accounting for the full multiple tunneling process between the dots through the Majorana island,within a master equation approach.In the co-tunneling regime,which results in a Majorana-mediated effective coupling between the dots,the master equation approach allows us to obtain analytic solutions for the measurement currents.The measurement quality,characterized by figures of merit such as the visibility of measurement signals,is carried out in regard to the unusual decoherence effect rather than ‘which-path' dephasing.The results obtained in this work are expected to be useful for future experiments of Majorana qubit and stabilizer measurements.