Quantum information processing with nitrogen–vacancy centers in diamond**Project supported by the National Basic Research Program of China (Grant Nos. 2014CB921402 and 2015CB921103), the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB07010300), the National Natural Science Foundation of China (Grant No. 11574386), and the Key Research Program of the Chinese Academy of Sciences (Grant No. XDPB0803).

Abstract

Nitrogen–vacancy (NV) center in diamond is one of the most promising candidates to implement room temperature quantum computing. In this review, we briefly discuss the working principles and recent experimental progresses of this spin qubit. These results focus on understanding and prolonging center spin coherence, steering and probing spin states with dedicated quantum control techniques, and exploiting the quantum nature of these multi-spin systems, such as superposition and entanglement, to demonstrate the superiority of quantum information processing. Those techniques also stimulate the fast development of NV-based quantum sensing, which is an interdisciplinary field with great potential applications.