Phys. Rev. B 63, 085313 (2001) [6 pages]Nuclear-spin qubit dephasing time in the integer quantum Hall effect regimeReceived 7 March 2000; revised 31 August 2000; published 5 February 2001 We report a theoretical estimate of the nuclear-spin dephasing time T2 owing to the spin interaction with the two-dimensional electron gas, when the latter is in the integer quantum Hall state, in a two-dimensional heterojunction or quantum well at low temperature, and in large applied magnetic field. We argue that the leading mechanism of dephasing is due to the impurity potentials that influence the dynamics of the spin via virtual magnetic spin-exciton scattering. Implications of our results for implementation of nuclear spins as quantum bits (qubits) for quantum computing are discussed. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.63.085313
DOI:
10.1103/PhysRevB.63.085313
PACS:
73.22.-b, 71.70.Ej, 03.67.Lx, 76.60.-k
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.