Protection of center-spin coherence by dynamically polarizing nuclear spin core in diamond

Abstract

We experimentally investigate the protection of electron spin coherence of nitrogen vacancy (NV) center in diamond by dynamical nuclear polarization. The electron spin decoherence of an NV center is caused by the magnetic ield fluctuation of the ${}^{13}$C nuclear spin bath, which contributes large thermal fluctuation to the center electron spin when it is in equilibrium state at room temperature. To address this issue, we continuously transfer the angular momentum from electron spin to nuclear spins, and pump the nuclear spin bath to a polarized state under Hartman-Hahn condition. The bath polarization effect is verified by the observation of prolongation of the electron spin coherence time ($T_2^{\ast }$). Optimal conditions for the dynamical nuclear polarization (DNP) process, including the pumping pulse duration and depolarization effect of laser pulses, are studied. Our experimental results provide strong support for quantum information processing and quantum simulation using polarized nuclear spin bath in solid state systems.

4 pages, 4 figures

References in corpus (20)

• Quantum Computing
• High-sensitivity diamond magnetometer with nanoscale resolution
• Universal dynamical decoupling of a single solid-state spin from a spin bath
• High precision nano scale temperature sensing using single defects in diamond
• Quantum error correction in a solid-state hybrid spin register
• Fault-Tolerant Quantum Dynamical Decoupling
• Universal control and error correction in multi-qubit spin registers in diamond
• Dynamic polarization of single nuclear spins by optical pumping of NV color centers in diamond at room temperature
• Decoherence-protected quantum gates for a hybrid solid-state spin register
• Extending Quantum Coherence in Diamond
• Detection and control of individual nuclear spins using a weakly coupled electron spin
• Coherence of single spins coupled to a nuclear spin bath of varying density
• Detecting and polarizing nuclear spins with double resonance on a single electron spin
• Electron spin decoherence of single Nitrogen-Vacancy defects in diamond
• Electron Spin Dephasing due to Hyperfine Interactions with a Nuclear Spin Bath
• Nuclear spin pair coherence in diamond for atomic scale magnetometry
• Nano-fabricated solid immersion lenses registered to single emitters in diamond
• Sensing and atomic-scale structure analysis of single nuclear spin clusters in diamond
• Radio-frequency magnetometry using a single electron spin
• Noise-resilient quantum evolution steered by dynamical decoupling

Cited by in corpus (8)

• Quantum many-body theory for electron spin decoherence in nanoscale nuclear spin baths
• Quantum probe hyperpolarisation of molecular nuclear spins
• Microwave-assisted cross-polarization of nuclear spin ensembles from optically-pumped nitrogen-vacancy centers in diamond
• Demonstration of Entanglement-Enhanced Phase Estimation in Solid
• Extending qubit coherence by adaptive quantum environment learning
• Strongly polarizing weakly coupled ${}^{13}$C nuclear spins with optically pumped nitrogen-vacancy center
• Electron ground state $g$ factor in embedded InGaAs quantum dots: An atomistic study
• Local probing of nuclear bath polarization with a single electronic spin