Sungkun Hong

TL;DR: An approach to nanoscale magnetic sensing is experimentally demonstrated, using coherent manipulation of an individual electronic spin qubit associated with a nitrogen-vacancy impurity in diamond at room temperature to achieve detection of 3 nT magnetic fields at kilohertz frequencies after 100 s of averaging.

TL;DR: A robust method for scanning a single nitrogen-vacancy centre within tens of nanometres from a sample surface that addresses both of these concerns is demonstrated, and is able to image magnetic domains with widths of 25 nm, and demonstrate a magnetic field sensitivity of 56 nT Hz(-1/2) at a frequency of 33 kHz, which is unprecedented for scanning nitrogen-Vacancy centres.

TL;DR: In this article, the authors demonstrate entanglement between two micromechanical oscillators across two chips that are separated by 20 centimetres, and the entangled quantum state is distributed by an optical field at a designed wavelength near 1,550 nanometres.

TL;DR: A magnetometer focused on nitrogen-vacancy centres in diamond can image the magnetic dipole field of a single target electron spin at room temperature and ambient pressure as discussed by the authors, which can be used to measure the magnetic field of an electron spin.

TL;DR: In this article, the authors reported non-classical correlations between single photons and phonons from a nanomechanical resonator, and implemented a quantum protocol involving initialization of the resonator in its quantum ground state of motion and subsequent generation and read-out of correlated photon-phonon pairs.