Research on Electrically Driven Single Photon Emitter by Diamond for Quantum Cryptography
Final rept. 26 Dec 2013-25 Dec 2014
OSAKA UNIV (JAPAN)
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Nitrogen-vacancy NV centers in diamond have emerged as a highly competitive platform for applications in quantum cryptography, quantum computing, spintronics, and sensing or metrology. These atomic-scale defects have two different charge states the neutral NV0 state, and the negatively charged NV . These two states have different optical and spin properties that can be exploited for applications. Deterministic and fast switching between these two states would be highly desirable. So far, however, charge-state control of the single NV center among the two charge states has only been achieved by optical means with stochastic process. Here, we demonstrate, deterministic, purely electrical, and room-temperature charge-state control of single NV centers. The results are useful not only for ultrafast electrical control of qubits, long T2 quantum memory, and quantum sensors associated with single NV centers but also for classical memory devices based on single atomic storage bits working under ambient conditions. Phys. Rev. X, 4, 01107 2014.