Measurements of a periodically driving qubit using a quantum point contact
Measurements of a periodically driving qubit using a quantum point contact
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使用量子点接触测量周期性驱动量子位
DOI：
10.1088/1674-1056/19/3/030308
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发表时间：
2010
影响因子：
1.7
通讯作者：
Wang Fang-Wei
中科院分区：
文献类型：
--
作者：
Wang Hai-Xia;Yin Wen;Wang Fang-Wei
使用 Gurvitz 开发的方法 [1996 Phys. Rev. B 53 15932]，我们获得了描述由量子点接触探测器监测的周期性驱动量子位的整个系统的布洛赫型速率方程。结果表明，由于量子位中的电子隧道更加困难，隔离量子位可以以大的驱动频率保持在其初始状态，并且这种初始状态始终可以在短时间内以小的测量引起的退相干率进行测量。
Using the method developed by Gurvitz [1996 Phys. Rev. B 53 15932], we obtained the Bloch-type rate equations describing the entire system of a periodically driving qubit monitored by a quantum point contact detector. The results demonstrate that the isolated qubit can be kept in its initial state with a large driving frequency due to more difficult electron tunneling in qubit, and this initial state can always be measured at a small measurement-induced decoherence rate during a short time.