![]() ![]() The ability to additionally control dark electron–spin defects that cannot be directly detected optically would open new opportunities. Multi-qubit quantum registers 4, 24, 25, 26, 27, quantum error correction 2, 3, enhanced sensing schemes 28, and entanglement distillation 29 have been realized using nuclear spins. The number of available spins can be further extended by controlling nuclear spins in the vicinity. Larger-scale systems can be realized by entangling multiple defects together through long-range optical network links 7, 8, 9 and through direct magnetic coupling, as demonstrated for a pair of ion-implanted NV centers 23, 24. These defects, including the nitrogen-vacancy (NV) and silicon-vacancy (SiV) centers in diamond and various defects in silicon-carbide 10, 11, 12, combine long spin coherence times 4, 13, 14, 15, 16, 17, 18, high-quality control and readout 2, 3, 4, 14, 19, 20, 21, and a coherent optical interface 7, 8, 9, 15, 19, 22. ![]() Optically active defects in solids provide promising qubits for quantum sensing 1, quantum-information processing 2, 3, 4, quantum simulations 5, 6, and quantum networks 7, 8, 9. These results provide a proof-of-principle towards using dark electron-nuclear spin defects as qubits for quantum sensing, computation and networks. We develop control and single-shot readout of the nuclear and electron spin, and use this to demonstrate an entangled state of two P1 centers. We realize projective measurements to prepare the multiple degrees of freedom of P1 centers-their Jahn-Teller axis, nuclear spin and charge state-and exploit these to selectively access multiple P1s in the bath. ![]() Here, we demonstrate the heralded initialisation, control and entanglement of individual dark spins associated to multiple P1 centers, which are part of a spin bath surrounding a nitrogen-vacancy center in diamond. While recent experiments have observed signatures of coherent interactions with such dark spins, it is an open challenge to realize the individual control required for quantum information processing. A promising approach for multi-qubit quantum registers is to use optically addressable spins to control multiple dark electron-spin defects in the environment. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |