Coherence of an optically illuminated single nuclear spin qubit

TitleCoherence of an optically illuminated single nuclear spin qubit
Publication TypeJournal Article
Year of Publication2008
AuthorsJiang, L, Dutt, MVGurudev, Togan, E, Childress, L, Cappellaro, P, Taylor, JM, Lukin, MD
JournalPhysical Review Letters
Date Published2008/2/19

We investigate the coherence properties of individual nuclear spin quantum bits in diamond [Dutt et al., Science, 316, 1312 (2007)] when a proximal electronic spin associated with a nitrogen-vacancy (NV) center is being interrogated by optical radiation. The resulting nuclear spin dynamics are governed by time-dependent hyperfine interaction associated with rapid electronic transitions, which can be described by a spin-fluctuator model. We show that due to a process analogous to motional averaging in nuclear magnetic resonance, the nuclear spin coherence can be preserved after a large number of optical excitation cycles. Our theoretical analysis is in good agreement with experimental results. It indicates a novel approach that could potentially isolate the nuclear spin system completely from the electronic environment.

Short TitlePhys. Rev. Lett.