Parallel selective nuclear-spin addressing for fast high-fidelity quantum gates, B. Tratzmiller, J. F. Haase, Z. Wang, and M. B. Plenio, Phys. Rev. A 103, 012607
DOI: doi.org/10.1103/PhysRevA.103.012607

The gist of it

Due to their long coherence times, nuclear spins have gained considerable attention as physical qubits. Their interaction can be mediated by nitrogen vacancy (NV) centers in diamond. In this work we generalize PulsePol, a pulse sequence developed in the Institute of Theoretical Physics to achieve robust polarization transfer from NV centers to nuclear spins, to a sequence that is resonant to two frequencies simultaneously, allowing to perform gates between two nuclear spins.

This approach results in efficient entangling gates that, compared to standard techniques, reduce the gate time by more than 50% when the gate time is limited by off-resonant coupling to other spins, and by up to 22% when the gate time is limited by small electron-nuclear coupling.

Precise Spectroscopy of High-Frequency Oscillating Fields with a Single-Qubit Sensor, Y. Chu, P. Yang, M. Gong, M. Yu, B. Yu, M. B. Plenio, A. Retzker, and J. Cai, Phys. Rev. Applied 15, 014031
DOI: doi.org/10.1103/PhysRevApplied.15.014031