Spin detection at elevated temperatures using a driven double quantum dot
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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 nondemolition 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.
Giavaras , G , Wabnig , J , Lovett , B W , Jefferson , J H & Briggs , G A D 2010 , ' Spin detection at elevated temperatures using a driven double quantum dot ' Physical Review. B, Condensed matter and materials physics , vol 82 , no. 8 , 085410 . DOI: 10.1103/PhysRevB.82.085410
Physical Review. B, Condensed matter and materials physics
© 2010. The American Physical Society.
The work is part of the UK QIP IRC Grant No. GR/S82176/01. J.W. thanks the Wenner-Gren Foundations for financial support. B.W.L. thanks the Royal Society. J.H.J. acknowledges support from the UK MoD. G.A.D.B. is supported by EPSRC Grant No. GR/S15808/01.
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