Geometric phase magnetometry using a solid-state spin

Abstract

Magnetometry is a powerful technique for the non-invasive study of biological and physical systems. A key challenge lies in the simultaneous optimization of magnetic field sensitivity and maximum field range. In interferometry-based magnetometry, a quantum two-level system acquires a dynamic phase in response to an applied magnetic field. However, due to the 2π periodicity of the phase, increasing the coherent interrogation time to improve sensitivity results in reduced field range. Here we introduce a route towards both large magnetic field range and high sensitivity via measurements of the geometric phase acquired by a quantum two-level system. We experimentally demonstrate geometric-phase magnetometry using the optically addressable electronic spin associated with the nitrogen vacancy (NV) color center in diamond. Our approach enables unwrapping of the 2π phase ambiguity, decoupling of magnetic field range from sensitivity, and enhancement of the field range by about 400 times. We also find additional improvement in sensitivity in the nonadiabatic regime, and study how geometric-phase decoherence depends on adiabaticity. Our results show that the geometric phase can be a versatile tool for quantum sensing applications.

14 pages, 4 figures

References in corpus (7)

• High-sensitivity diamond magnetometer with nanoscale resolution
• Universal dynamical decoupling of a single solid-state spin from a spin bath
• Optical magnetic detection of single-neuron action potentials using quantum defects in diamond
• Observation of Berry's Phase in a Solid State Qubit
• Experimental Realization of Universal Geometric Quantum Gates with Solid-State Spins
• Control and Local Measurement of the Spin Chemical Potential in a Magnetic Insulator
• Robust High-Dynamic-Range Vector Magnetometry via Nitrogen-Vacancy Centers in Diamond

Cited by in corpus (12)

• Sensitivity Optimization for NV-Diamond Magnetometry
• Noisy intermediate-scale quantum computers
• Super-robust nonadiabatic geometric quantum control
• Observation of a quantum phase from classical rotation of a single spin
• Optimal control of a nitrogen-vacancy spin ensemble in diamond for sensing in the pulsed domain
• Wilson loop and Wilczek-Zee phase from a non-Abelian gauge field
• Interplay between geometric and dynamic phases in a single spin system
• Microscopic theory of a precessing ferromagnet for ultrasensitive magnetometry
• Probabilistic magnetometry with two-spin system in diamond
• Geometric phase and non-adiabatic resonance of the Rabi model
• Monopole Field Textures in Interacting Spin Systems
• Topological Transitions in a Kerr Nonlinear Oscillator