CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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The Nuclear Dark State under Dynamical Nuclear Polarization |
YU Hong-Yi**, LUO Yu, YAO Wang |
Department of Physics, and Center for Theoretical and Computational Physics, The University of Hong Kong, Hong Kong
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Cite this article: |
YU Hong-Yi, LUO Yu, YAO Wang 2013 Chin. Phys. Lett. 30 077302 |
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Abstract We analyze aspects of nuclear dark states. The formation of the dark states prevents the further establishment of nuclear polarizations, while inhomogeneous nuclear spin precessions can result in leakage from these states. An optimal efficiency for pumping nuclear polarization is achieved when the dynamical nuclear polarization (DNP) cycling rate is comparable to the dark-state leakage rate. When the DNP rate is much larger, the nuclear spin bath can be locked on the dark states. We propose schemes where the inhomogeneous precessions can be suppressed for the realization of large-scale dark states. As the dark states correspond to low transverse nuclear field fluctuations, they can be used to suppress the decoherence of the electron induced by the nuclear spins.
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Received: 27 February 2013
Published: 21 November 2013
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PACS: |
73.21.La
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(Quantum dots)
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03.67.Pp
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(Quantum error correction and other methods for protection against decoherence)
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76.70.Fz
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(Double nuclear magnetic resonance (DNMR), dynamical nuclear polarization)
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Abstract
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