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Spin detection at elevated temperatures using a driven double quantum dot

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giavaras2010physrevb085410.pdf (257.9Kb)
Date
06/08/2010
Author
Giavaras, G.
Wabnig, J.
Lovett, B. W.
Jefferson, J. H.
Briggs, G. A. D.
Keywords
Electron-spin
QC Physics
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Abstract
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.
Citation
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 . https://doi.org/10.1103/PhysRevB.82.085410
Publication
Physical Review. B, Condensed matter and materials physics
Status
Peer reviewed
DOI
https://doi.org/10.1103/PhysRevB.82.085410
ISSN
1098-0121
Type
Journal article
Rights
© 2010. The American Physical Society.
Description
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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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/5210

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