射频电荷奇偶校验仪
A Radio Frequency Charge Parity Meter
摘要：
我们展示了一个总的电荷宇称测量通过检测的射频信号，是由一个集总元件谐振器耦合到一个单一的InAs纳米线双量子点反射。电路的高频响应被用来探测泡利不相容原理对点间电荷跃迁的影响。偶宇称电荷跃迁表现出显著的磁场依赖性，这是由于单重态-三重态跃迁，而奇宇称跃迁对磁场相对不敏感。测量的响应与腔输入输出理论符合得很好，可以精确测量点间隧道耦合和谐振腔-电荷耦合率gc/2pi~17MHz。
英文摘要：
We demonstrate a total charge parity measurement by detecting the radio frequency signal that is reflected by a lumped element resonator coupled to a single InAs nanowire double quantum dot. The high frequency response of the circuit is used to probe the effects of the Pauli exclusion principle at interdot charge transitions. Even parity charge transitions show a striking magnetic field dependence that is due to a singlet-triplet transition, while odd parity transitions are relatively insensitive to magnetic field. The measured response agrees well with cavity input-output theory, allowing accurate measurements of the interdot tunnel coupling and the resonator-charge coupling rate g_c/2pi ~ 17 MHz.
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