Spin quantum measurements on diamond defects

Chong Zu, Francisco Machado, Bryce Kobrin +5 more

A. R. Cooper, Won Kyu Calvin Sun, Jean-Christophe Jaskula +1 more

Nitrogen-vacancy centers in diamond are sensitive probes of time-varying magnetic fields that can be used to identify unknown spin defects in their nearby environment. Performing spectral quantum measurements on such single quantum probes enables gaining information about the internal structure and dynamics of nearby spin defects that would otherwise be inaccessible through direct or indirect measurements with classical probes. Here, we identify a system composed of two electron-nuclear spin defects in a diamond crystal by performing a series of spectral identification measurements using a single nitrogen-vacancy center in diamond. Besides enabling the identification of new spin defects and studies of their formation mechanisms, these techniques will be useful for scaling up quantum systems by converting environmental spin defects into quantum resources.

Gerard J Milburn

Changes in the state of a single spin at a defect in diamond, read out from optical measurements, could be used in quantum sensing and computing.

Liang Jiang

Bob B. Buckley, Gregory D. Fuchs, Lee C. Bassett +1 more

Dressing-Up Diamond Defects The spin states of nitrogen vacancy defects in diamond are being explored as information carriers and memories in quantum information systems. Their long lifetimes, fast manipulation rates, and the ability to couple them to adjacent electronic and nuclear spins provide the necessary properties for implementation in solid-state quantum networks. To date, however, the readout of the spin state via photoluminescence, either directly or indirectly, results in the destruction of the spin state. Buckley et al. (p. 1212 , published online 14 October; see the Perspective by Milburn ) have formed a light-matter hybrid state in which the spin interacts with laser light to form a polariton state. This hybrid state can be optically probed to produce a nondestructive measurement and manipulation technique for the spin state of the nitrogen-vacancy center.

Philip F. Schewe