Charge and Spin State Readout of a Double Quantum Dot Coupled to a Resonator

Charge and Spin State Readout of a Double Quantum Dot Coupled to a Resonator
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DOI:
10.1021/nl100663w
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发表时间:
2010-08-01
期刊:
影响因子:
10.8
通讯作者:
Ritchie, D. A.
Ritchie, D. A.
中科院分区:
材料科学1区
文献类型:
--
作者:
Petersson, K. D.;Smith, C. G.;Ritchie, D. A.

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状态读出是量子计算机的关键要求。对于基于半导体的量子位设备,通常使用单独的介观静电计来完成。在这里,我们演示了一种简单的检测方案,其中使用耦合到半导体双量子点的射频谐振电路来探测其电荷和自旋态。这些结果展示了一种新的非侵入性技术,用于测量量子点系统中的电荷和自旋态,而不需要单独的介观探测器。
State readout is a key requirement for a quantum computer. For semiconductor-based qubit devices it is usually accomplished using a separate mesoscopic electrometer. Here we demonstrate a simple detection scheme in which a radio frequency resonant circuit coupled to a semiconductor double quantum dot is used to probe its charge and spin states. These results demonstrate a new noninvasive technique for measuring charge and spin states in quantum dot systems without requiring a separate mesoscopic detector.