Extension of the Coherence Time by Generating MW Dressed States in a Single NV Centre in Diamond

Abstract

Nitrogen-vacancy (NV) centres in diamond hold promise in quantum sensing applications. A major interest in them is an enhancement of their sensitivity by the extension of the coherence time ($T_2$). In this report, we experimentally generated more than four dressed states in a single NV centre in diamond based on Autler-Townes splitting (ATS). We also observed the extension of the coherence time to $T_2\sim$ 1.5 ms which is more than two orders of magnitude longer than that of the undressed states. As an example of a quantum application using these results we propose a protocol of quantum sensing, which shows more than an order of magnitude enhancement in the sensitivity.

arXiv comment8 pages, 9 figures

References in corpus (20)

• High-sensitivity diamond magnetometer with nanoscale resolution
• Nanometer scale quantum thermometry in a living cell
• Universal dynamical decoupling of a single solid-state spin from a spin bath
• Coherent coupling of a superconducting flux-qubit to an electron spin ensemble in diamond
• Hybrid quantum circuit with a superconducting qubit coupled to a spin ensemble
• Dynamical Decoupling of a single electron spin at room temperature
• Coherence of single spins coupled to a nuclear spin bath of varying density
• Universal enhancement of the optical readout fidelity of single electron spins
• NMR Technique for Determining the Depth of Shallow Nitrogen-Vacancy Centers in Diamond
• Quantum metrology enhanced by repetitive quantum error correction
• Rotating-frame relaxation as a noise spectrum analyzer of a superconducting qubit undergoing driven evolution
• Enhanced solid-state multi-spin metrology using dynamical decoupling
• Sensing and atomic-scale structure analysis of single nuclear spin clusters in diamond
• Optimizing a Dynamical Decoupling Protocol for Solid-State Electronic Spin Ensembles in Diamond
• A Dressed Spin Qubit in Silicon
• Photophysics of single nitrogen-vacancy centers in diamond nanocrystals
• Spin decoherence and electron spin bath noise of a nitrogen-vacancy center in diamond
• Quantum Sensing of Weak Radio-Frequency Signals by Pulsed Mollow Absorption Spectroscopy
• Microwave saturation spectroscopy of nitrogen-vacancy ensembles in diamond
• Hybrid quantum magnetic field sensor with an electron spin and a nuclear spin in diamond