Dark state polarizing a nuclear spin in the vicinity of a nitrogen-vacancy center

Abstract

The nuclear spin in the vicinity of a nitrogen-vacancy (NV) center possesses of long coherence time and convenient manipulation assisted by the strong hyperfine interaction with the NV center. It is suggested for the subsequent quantum information storage and processing after appropriate initialization. However, current experimental schemes are either sensitive to the inclination and magnitude of the magnetic field or require thousands of repetitions to achieve successful realization. Here, we propose polarizing a 13 C nuclear spin in the vicinity of an NV center via a dark state. We demonstrate theoretically that it is robust to polarize various nuclear spins with different hyperfine couplings and noise strengths.

Broad-band negative refraction via simultaneous multi-electron transitions

“…Metamaterials with negative refraction [1][2][3][4][5][6][7] have attracted broad interest because of their potential applications, including perfect lenses [2,8], fingerprint identification in forensic science [9], simulating condensed matter phenomena and reversed Doppler effect [10,11], controlling light polarization [12], and electromagnetic cloaking [13][14][15]. In order to realize metamaterials, a number of routes have been proposed, including (molecular) split-ring resonators [3,16,17], chiral approaches [18], hyperbolic dispersion [19][20][21][22], dark-state mechanism [23][24][25][26][27], and topological routes [28][29][30]. However, none of these can effectively overcome the difficulty of realizing broad-band negative refraction.…”

Optical nonreciprocity in rotating diamond with nitrogen-vacancy center

“…III, we numerically show the transmittance for the two cases and analyze the results by the dark-state mechanism in Ref. [38]. Finally, we discuss the prospect of our proposal and sum- marize the main findings in Sec.…”

“…Because it has a wide range of prospective applications, e.g. nonreciprocal transmission and memory of nonclassical fields [30,31], EIT has been successfully realized in many systems, such as gas-phase * Electronic address: aiqing@bnu.edu.cn atoms [32,33], photosynthetic energy transfer [34,35], metamaterial [36], superconducting system [37], and NV center in diamond [38].…”

Longitudinal relaxation of a nitrogen-vacancy center in a spin bath by generalized cluster-correlation expansion method

“…It can be coherently controlled by microwave fields and is highly sensitive to external electric and magnetic fields. These superior characteristics make the NV center a promising candidate for quantum information processing [5][6][7][8] and quantum sensing of electric and magnetic fields [9][10][11], temperature [12], stress [13], biological structures [14] and chemical reactions [15]. Such appealing applications require full knowledge of its decoherence behavior, including both transverse and longitudinal relaxation [16][17][18], over a broad range of physical parameters, such as temperature, magnetic field, type and concentration of impurities.…”