Steady-state preparation of long-lived nuclear spin singlet pairs at room temperature
Q. Chen, Ilai Schwarz, Martin Bodo Plenio
The coherent high-fidelity generation of nuclear spins in long-lived singlet states, which may find application as quantum memory or sensor, represents a considerable experimental challenge. Here, we propose a dissipative scheme that achieves the preparation of pairs of nuclear spins in long-lived singlet states by a protocol that combines the interaction between the nuclei and a periodically reset electron spin of an nirogen-vacancy center with local radio-frequency control of the nuclear spins. The final state of this protocol is independent of the initial preparation of the nuclei, is robust to external field fluctuations, and can be operated at room temperature. We show that a high-fidelity singlet pair of a $^{13}\mathrm{C}$ dimer in a nuclear bath in diamond can be generated under realistic experimental conditions.
arXiv:1703.04308•Physical review. B./Physical review. B•Jun 21, 2017•11 citations