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arXiv · 1403.3311

Fast Room-Temperature Phase Gate on a Single Nuclear Spin in Diamond

S. Sangtawesin·T. O. Brundage·J. R. Petta
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Abstract

Nuclear spins support long lived quantum coherence due to weak coupling to the environment, but are difficult to rapidly control using nuclear magnetic resonance (NMR) as a result of the small nuclear magnetic moment. We demonstrate a fast ~ 500 ns nuclear spin phase gate on a 14N nuclear spin qubit intrinsic to a nitrogen-vacancy (NV) center in diamond. The phase gate is enabled by the hyperfine interaction and off-resonance driving of electron spin transitions. Repeated applications of the phase gate bang-bang decouple the nuclear spin from the environment, locking the spin state for up to ~ 140 microseconds.

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S. Sangtawesin, T. O. Brundage, J. R. Petta. 2014-07-14. Fast Room-Temperature Phase Gate on a Single Nuclear Spin in Diamond. https://doi.org/10.1103/physrevlett.113.020506

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