Spin detection at elevated temperatures using a driven double quantum dot

Details Spin detection at elevated temperatures using a driven double quantum dot Spin detection at elevated temperatures using a driven double quantum dot

2010-04-08

arxiv.org/abs/1004.1289v1

Phys. Rev. B 82, 085410 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 6 figures

Scientific paper

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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