Relaxation of a dense ensemble of spins in diamond under a continuous microwave driving field.

ABSTRACT: Decoherence of Rabi oscillation in a two-level quantum system consists of two components, a simple exponential decay and a damped oscillation. In dense-ensemble spin systems like negatively charged nitrogen-vacancy (NV^-) centers in diamond, fast quantum state decoherence often obscures clear observation of the Rabi nutation. On the other hand, the simple exponential decay (or baseline decay) of the oscillation in such spin systems can be readily detected but has not been thoroughly explored in the past. This study investigates in depth the baseline decay of dense spin ensembles in diamond under continuously driving microwave (MW). It is found that the baseline decay times of NV^- spins decrease with the increasing MW field strength and the MW detuning dependence of the

SUBMITTER: Chen J 

PROVIDER: S-EPMC8358020 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature