Indirect control of 13C nuclear spin in nitrogen vacancy center in diamond
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2025-01-01 |
| Journal | Journal of Physics Conference Series |
| Authors | Kritsana Saego, Sorawis Sangtawesin |
Abstract
Section titled āAbstractāAbstract The nitrogen vacancy (NV) center in diamond is one of the solid-state spin systems that can be manipulated as a qubit for quantum computing. However, scaling up the system to perform as a quantum register is challenging due to weak dipole interaction between two NV centers. On the other hand, 13 C nuclear spins that reside within the diamond lattice can be used as additional qubits for scaling up the system, as they have hyperCine interactions with the NV center electronic spin. In general, nuclear spins exhibit a longer coherence time compared to the electron spin due to the lower gyromagnetic ratio. Nevertheless, this weak interaction also makes it difficult to directly control the nuclear spin via RF transition. In this work, we demonstrated a scheme to control and observe the dynamics of nuclear spin with a hyperCine splitting of 6.5 MHz using an indirect pulse sequence that operated only the electron spin in absence of any RF signal. Our results reveal a nuclear spin free precession with a gyromagnetic ratio of 6.9 Ā± 0.1 kHz/Gauss. Furthermore, one can observe the nuclear spin phase accumulation in electronic spin m s = - 1 manifold and show the reduced contrast results from incomplete population transfer during the operation.