Transport signatures of a Majorana qubit and read-out-induced dephasing
Transport signatures of a Majorana qubit and read-out-induced dephasing
复制标题
马约拉纳量子位的传输签名和读出引起的相移
DOI:
10.1088/1367-2630/ab1431
复制
发表时间:
2019-01
影响因子:
3.3
通讯作者:
Schoen Gerd
中科院分区:
文献类型:
--
作者:
Qin Lupei;Li Xin Qi;Shnirman Alex;er;Schoen Gerd
Motivated by recent proposals of Majorana qubits and the read-out of their quantum state we investigate a qubit setup formed by two parallel topological wires shunted by a superconducting bridge. The wires are further coupled to two quantum dots, which are also linked directly, thus creating an interference loop. The transport current through this system shows an interference pattern which distinguishes two basis states of the qubit in a QND measurement. We analyze various properties of the interference current and the read-out process, including the resulting dephasing and relaxation. We also analyze the effects of varying control parameters such as gate voltages on the current. The characteristic dependencies may serve as a signature of Majorana bound states.
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