Braiding Operations for a Topological Josephson Junction Array using SFQ Current Pulses
Braiding Operations for a Topological Josephson Junction Array using SFQ Current Pulses
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使用 SFQ 电流脉冲对拓扑约瑟夫森结阵列进行编织操作
DOI：
10.1088/1742-6596/2323/1/012035
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
Myoren Hiroaki
中科院分区：
文献类型：
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作者：
Funazawa Takuro;Naruse Masato;Myoren Hiroaki
马约拉纳束缚态 (MBS) 可以出现在拓扑约瑟夫森结 (JJ) 阵列中，并且存在具有 2π 相绕组的分数涡旋。理论上表明，编织操作可以通过使用电流脉冲来实现，与单通量量子（SFQ）技术兼容。因此，我们设计了一种SFQ逻辑电路，用于在传统JJ阵列中使用单通量量子进行拓扑JJ阵列的编织操作。编织操作可以通过具有双通量量子驱动器的SFQ逻辑电路来实现。为了使用 SFQ 逻辑电路获得正负电流脉冲，我们使用带有交流偏置的 SFQ 逻辑电路进行仿真。最后，我们通过仿真确认了使用阵列型SFQ电路的CNOT运算，并估算了CNOT运算速度。
Majorana bound states (MBSs) can occur in topological Josephson junction (JJ) arrays with the presence of a fractional vortex with 2π-phase winding. It has been theoretically shown that the braiding operation can be achieved by using current pulses, compatible with single flux quantum (SFQ) technology. Therefore, we designed an SFQ logic circuit for the braiding operations of the topological JJ array using single flux quanta in a conventional JJ array. Braiding operations could be realized by an SFQ logic circuit with double flux quantum driver. To obtain positive and negative current pulses using the SFQ logic circuit, we used SFQ logic circuits with ac biasing for simulation. Finally, we confirmed the CNOT operation using an array-type SFQ circuit by means of simulation and estimated the CNOT operation speed.