LAMP SEMINAR

In recent years, solid-state systems have been at the forefront of quantum technology research. Among these, the Nitrogen vacancy center (NV) in diamond stand out as a remarkable optically active defect because of its unique properties of long coherence times, ease of initialization and readout, and coupling to nearby individual nuclear spins, all at room temperatures, making it an ideal platform for quantum sensing and simulations. In our laboratory, we utilize NVs implanted at varying depths and with different nitrogen concentrations. Our research focuses on nano-scale NMR, in shallow implanted NVs, and manipulation of individual 13C nuclear spin coupled to the NVs, in bulk NV samples, by employing a variety of adiabatic and diabatic dynamical decoupling (DD) sequences.

In my talk, I will present our recent and some ongoing experiments on the implementation of NV-mediated indirect nuclear spin manipulation techniques. We achieve efficient nuclear spin polarization and arbitrary nuclear spin state preparation using a combination of XY-n [1], PulsePol [2], and adiabatic pulse-sequences [3] in bulk diamond NV samples and compare the efficiency of different techniques. With these capabilities we aim to establish this coupled NVs-nuclear spins system as a reliable and robust room temperature testbed for quantum simulations, allowing us to explore quantum thermodynamics [4] and driven many-body systems [5], towards investigation of quantum devices.

References:

[1] Taminiau et al., PRL 109, 137602 (2012); [2] Schwartz et al., Sci. Adv. 2018; [3] Whaites et al., PRR. 4, 013214 (2022); [4] Pal et al., Phys. Rev. A 100, 042119 (2019); [5] Pal et al., Phys. Rev. Lett. 120, 180602 (2018).