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Phonon-Induced Population Dynamics and Intersystem Crossing in Nitrogen-Vacancy Centers

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arxiv 1406.4065 v3 pith:Y4S2FCNI submitted 2014-06-16 quant-ph cond-mat.mes-hall

Phonon-Induced Population Dynamics and Intersystem Crossing in Nitrogen-Vacancy Centers

classification quant-ph cond-mat.mes-hall
keywords centermodelphonon-inducedcrossingdynamicsexcitedintersystemmixing
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We report direct measurement of population dynamics in the excited state manifold of a nitrogen-vacancy (NV) center in diamond. We quantify the phonon-induced mixing rate and demonstrate that it can be completely suppressed at low temperatures. Further, we measure the intersystem crossing (ISC) rate for different excited states and develop a theoretical model that unifies the phonon-induced mixing and ISC mechanisms. We find that our model is in excellent agreement with experiment and that it can be used to predict unknown elements of the NV center's electronic structure. We discuss the model's implications for enhancing the NV center's performance as a room-temperature sensor.

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