Efficient Readout of a Single Spin State in Diamond via Spin-to-Charge Conversion
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2015-03-31 |
| Journal | Physical Review Letters |
| Authors | Brendan Shields, Quirin Unterreithmeier, Nathalie P. de Leon, Hongkun Park, Mikhail D. Lukin |
| Institutions | Harvard University |
| Citations | 224 |
Abstract
Section titled āAbstractāEfficient readout of individual electronic spins associated with atomlike impurities in the solid state is essential for applications in quantum information processing and quantum metrology. We demonstrate a new method for efficient spin readout of nitrogen-vacancy (NV) centers in diamond. The method is based on conversion of the electronic spin state of the NV to a charge-state distribution, followed by single-shot readout of the charge state. Conversion is achieved through a spin-dependent photoionization process in diamond at room temperature. Using NVs in nanofabricated diamond beams, we demonstrate that the resulting spin readout noise is within a factor of 3 of the spin projection noise level. Applications of this technique for nanoscale magnetic sensing are discussed.