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Open Quantum Systems Decoherence

Leakage-induced decoherence during single electron spin manipulation in a double quantum dot

arXiv
Authors: Shi-Hua Ouyang, Chi-Hang Lam, J. Q. You

Year

2007

Paper ID

49543

Status

Preprint

Abstract Read

~2 min

Abstract Words

90

Citations

N/A

Abstract

Coherent single electron spin oscillation in a double quantum dot system driven by a magnetic electron spin resonance field is studied theoretically using a Bloch-type rate equation approach. The oscillation frequency and relaxation time obtained using typical model parameters are consistent with experiment findings. The dominant decoherence mechanism is identified to be a leakage current through a Coulomb blockade barrier at a quantum dot during the spin manipulation. Nuclear field fluctuations which induce a long relaxation time are found to contribute only negligibly to the decoherence despite an earlier suggestion.

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  • Coherent single electron spin oscillation in a double quantum dot system driven by a magnetic electron spin resonance field is studied theoretically using a Bloch-type rate...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:0707.4040 [2] arXiv https://arxiv.org/abs/0707.4040 [3] Publisher https://arxiv.org/abs/0707.4040

Local Citation Graph (Related-Paper Links)

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