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NASA NTRS · 20060043578

Effects of electron-nuclear spin interaction on electron-spin qubit operations

Lee, Seungwon·von Allmen, Paul·Oyafuso, Fabiano·Klimeck, Gerhard·Whaley, Birgitta K.
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ensemble dephasingqubit operation errorquantum computation

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Lee, Seungwon, von Allmen, Paul, Oyafuso, Fabiano, Klimeck, Gerhard, Whaley, Birgitta K.. 2004-03-23. Effects of electron-nuclear spin interaction on electron-spin qubit operations. https://ntrs.nasa.gov/citations/20060043578

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NASA NTRS2004

Electron Spin Dephasing and Decoherence by Interaction with Nuclear Spins in Self-Assembled Quantum Dots

Electron spin dephasing and decoherence by its interaction with nuclear spins in self-assembled quantum dots are investigated in the framework of the empirical tight-binding model. Electron spin dephasing in an ensemble of dots is induced by the inhomogeneous precession frequencies of the electron among dots, while electron spin decoherence in a single dot arises from the inhomogeneous precession frequencies of nuclear spins in the dot. For In(x)Ga(1-x) As self-assembled dots containing ~30000 nuclei, the dephasing and decoherence times are predicted to be on the order of 100 ps and 1 (micro)s.

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