Pulsed-gate measurements of the singlet-triplet relaxation time in a two-electron double quantum dot
Pulsed-gate measurements of the singlet-triplet relaxation time in a two-electron double quantum dot
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DOI：
10.1103/physrevb.72.161301
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发表时间：
2005-10-01
影响因子：
3.7
通讯作者：
Gossard, AC
中科院分区：
文献类型：
--
作者：
Petta, JR;Johnson, AC;Gossard, AC
利用脉冲门技术测量了双电子双量子点中近简并自旋态的单重态-三重态弛豫时间。作为脉冲周期持续时间和磁场的函数测量的从（1，1）电荷占据状态到（0，2）状态的跃迁允许测量（1，1）单重态-三重态弛豫时间（>= 70 μ s）和（0，2）单重态-三重态分裂。这种技术可以很容易地应用于读出在单重态-三重态基础上操作的自旋量子比特。
A pulsed-gate technique with charge sensing is used to measure the singlet-triplet relaxation time for nearly degenerate spin states in a two-electron double quantum dot. Transitions from the (1,1) charge occupancy state to the (0,2) state, measured as a function of pulse cycle duration and magnetic field, allow the (1,1) singlet-triplet relaxation time (>= 70 mu s) and the (0,2) singlet-triplet splitting to be measured. This technique can be readily applied to read out a spin-qubit operating in a singlet-triplet basis.