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29 March 2024
 
  » arxiv » cond-mat/0104148

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Nucleus-mediated spin-flip transitions in GaAs quantum dots
Sigurdur I. Erlingsson ; Yuli V. Nazarov ; Vladimir I. Fal’ko ;
Date 9 Apr 2001
Subject Mesoscopic Systems and Quantum Hall Effect | cond-mat.mes-hall
AbstractSpin-flip rates in GaAs quantum dots can be quite slow, thus opening up the possibilities to manipulate spin states in the dots. We present here estimations of inelastic spin-flip rates mediated by hyperfine interaction with nuclei. Under general assumptions the nucleus mediated rate is proportional to the phonon relaxation rate for the corresponding non-spin-flip transitions. The rate can be accelerated in the vicinity of a singlet-triplet excited states crossing. The small proportionality coefficient depends inversely on the number of nuclei in the quantum dot. We compare our results with known mechanisms of spin-flip in $GaAs$ quantum dot.
Source arXiv, cond-mat/0104148
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