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arXiv 1004.1289cond-mat.mes-hall
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利用驱动双量子点在高温下探测自旋

Spin detection at elevated temperatures using a driven double quantum dot

G. Giavaras, J. Wabnig, B. W. Lovett, J. H. Jefferson, G. A. D. Briggs

摘要:

我们考虑泡利封锁区中的双量子点与附近的单自旋相互作用。我们表明,在微波辐射下的点的平均电子职业表现出共振附近的自旋状态是敏感的。因此,该系统充当附近自旋的自旋计。我们研究了非破坏性读出自旋的条件,发现该测量仪在与点充电能量相当的温度下工作,并且灵敏度主要受到点内自旋弛豫的限制。

英文摘要:

We consider a double quantum dot in the Pauli blockade regime interacting with a nearby single spin. We show that under microwave irradiation the average electron occupations of the dots exhibit resonances that are sensitive to the state of the nearby spin. The system thus acts as a spin meter for the nearby spin. We investigate the conditions for a non-demolition read-out of the spin and find that the meter works at temperatures comparable to the dot charging energy and sensitivity is mainly limited by the intradot spin relaxation.

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