Quenching Spin Decoherence in Diamond through Spin Bath Polarization

Abstract

We experimentally demonstrate that the decoherence of a spin by a spin bath can be completely eliminated by fully polarizing the spin bath. We use electron paramagnetic resonance at 240 gigahertz and 8 Tesla to study the spin coherence time $T_2$ of nitrogen-vacancy centers and nitrogen impurities in diamond from room temperature down to 1.3 K. A sharp increase of $T_2$ is observed below the Zeeman energy (11.5 K). The data are well described by a suppression of the flip-flop induced spin bath fluctuations due to thermal spin polarization. $T_2$ saturates at $\sim 250\mu s$ below 2 K, where the spin bath polarization is 99.4 %.

5 pages and 3 figures

References in corpus (3)

• Hyperfine interaction in a quantum dot: Non-Markovian electron spin dynamics
• Large nuclear Overhauser fields detected in vertically-coupled double quantum dots
• A multi-frequency high-field pulsed EPR / ENDOR spectrometer

Cited by in corpus (4)

• Coherence of single spins coupled to a nuclear spin bath of varying density
• Prospects for measurement-based quantum computing with solid state spins
• Coherent Manipulation and Decoherence of S=10 Single-Molecule Magnets
• Quantum correlation in disordered spin systems: entanglement and applications to magnetic sensing