Dynamic Nuclear Polarization in Double Quantum Dots

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Dynamic Nuclear Polarization in Double Quantum Dots

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Title: Dynamic Nuclear Polarization in Double Quantum Dots
Author: Gullans, Michael John; Krich, Jacob Jonathan; Taylor, Jacob Mason; Bluhm, Hendrik; Halperin, Bertrand I.; Marcus, Charles Masamed; Stopa, Michael P; Yacoby, Amir; Lukin, Mikhail D.

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Citation: Gullans, Michael J., Jacob J. Krich, Jacob M. Taylor, Hendrik Bluhm, Bertrand I. Halperin, Charles M. Marcus, Michael P. Stopa, Amir Yacoby and Mikhail D. Lukin. 2010. Dynamic Nuclear Polarization in Double Quantum Dots. Physical Review Letters 104(22): 226807.
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Abstract: We theoretically investigate the controlled dynamic polarization of lattice nuclear spins in GaAs double quantum dots containing two electrons. Three regimes of long-term dynamics are identified, including the buildup of a large difference in the Overhauser fields across the dots, the saturation of the nuclear polarization process associated with formation of so-called ‘‘dark states’’, and the elimination of the difference field. We show that in the case of unequal dots, buildup of difference fields generally accompanies the nuclear polarization process, whereas for nearly identical dots, buildup of difference fields competes with polarization saturation in dark states. The elimination of the difference field does not, in general, correspond to a stable steady state of the polarization process.
Published Version: doi:10.1103/PhysRevLett.104.226807
Other Sources: http://marcuslab.harvard.edu/papers/Gullans_DNP_PRL2010.pdf
Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:5129890
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