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Quantum limit for nuclear spin polarization in semiconductor quantum dots

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2014

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https://doi.org/10.1103/PhysRevB.89.205302
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Physical Review B. 2014, 89(20), 205302. ISSN 1098-0121. eISSN 1550-235X. Available under: doi: 10.1103/PhysRevB.89.205302

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A recent experiment [E. A. Chekhovich et al., Phys. Rev. Lett. 104, 066804 (2010)] has demonstrated that high nuclear spin polarization can be achieved in self-assembled quantum dots by exploiting an optically forbidden transition between a heavy hole and a trion state. However, a fully polarized state is not achieved as expected from a classical rate equation. Here, we theoretically investigate this problem with the help of a quantum master equation and we demonstrate that a fully polarized state cannot be achieved due to formation of a nuclear dark state. Moreover, we show that the maximal degree of polarization depends on structural properties of the quantum dot.

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ISO 690HILDMANN, Julia, Eleftheria E. KAVOUSANAKI, Guido BURKARD, Hugo RIBEIRO, 2014. Quantum limit for nuclear spin polarization in semiconductor quantum dots. In: Physical Review B. 2014, 89(20), 205302. ISSN 1098-0121. eISSN 1550-235X. Available under: doi: 10.1103/PhysRevB.89.205302
BibTex
@article{Hildmann2014Quant-32365,
  year={2014},
  doi={10.1103/PhysRevB.89.205302},
  title={Quantum limit for nuclear spin polarization in semiconductor quantum dots},
  number={20},
  volume={89},
  issn={1098-0121},
  journal={Physical Review B},
  author={Hildmann, Julia and Kavousanaki, Eleftheria E. and Burkard, Guido and Ribeiro, Hugo},
  note={Article Number: 205302}
}
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