Probabilistic magnetometry with two-spin system in diamond

Abstract

Solid-state magnetometers like the Nitrogen-Vacancy center in diamond have been of paramount importance for the development of quantum sensing with nanoscale spatial resolution. The basic protocol is a Ramsey sequence, that imprints an external static magnetic field into phase of the quantum sensor, which is subsequently readout. In this work we show that the hyperfine coupling between the Nitrogen-Vacancy and a nearby Carbon-13 can be used to set a post-selection protocol that leads to an enhancement of the sensitivity under realistic experimental conditions. We found that for an isotopically purified sample the detection of weak magnetic fields in the $\mu$T range can be achieved with a sensitivity of few nTHz${}^{-1/2}$ at cryogenic temperature ($4$ K), and $0.1$ $\mu$THz${}^{-1/2}$ at room temperature.

References in corpus (9)

• High-sensitivity diamond magnetometer with nanoscale resolution
• Universal dynamical decoupling of a single solid-state spin from a spin bath
• Ultrasensitive Beam Deflection Measurement via Interferometric Weak Value Amplification
• Dynamic polarization of single nuclear spins by optical pumping of NV color centers in diamond at room temperature
• Optimizing the Signal to Noise Ratio of a Beam Deflection Measurement with Interferometric Weak Values
• Weak-value amplification as an optimal metrological protocol
• Quantum sensors based on weak-value amplification cannot overcome decoherence
• Hybrid quantum magnetic field sensor with an electron spin and a nuclear spin in diamond
• Stimulated Raman Adiabatic control of a nuclear spin in diamond

Cited by in corpus (5)

• Dynamical quantum phase transition in diamond: applications in quantum metrology
• Effect of inter-system crossing rates and optical illumination on the polarization of nuclear spins nearby nitrogen-vacancy centers
• Quantum Sensing Enhancement through a Nuclear Spin Register in Nitrogen-Vacancy Centers in Diamond
• Engineering non-Markovianity from defect-phonon interactions
• Cost-effective temperature estimation strategies for thermal states with probabilistic quantum metrology