Geordie Rose, Anatoly Yu. Smirnov
Published 2000-11-14, updated 2001-09-10Version 2
The role of nuclear spins in decoherence and dephasing of a solid state phase qubit is investigated. Both effects of static spin environment and spin polarization fluctuations in time are considered on the basis of non-Markovian Langevin-Bloch equations. We find conditions when coupling of a phase qubit to a bath of nuclear spins does not impair coherent evolution of the qubit.
Comments: 24 pages, RevTeX
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