Dissipative superradiant spin amplifier for enhanced quantum sensing

Abstract

Quantum metrology protocols exploiting ensembles of $N$ two-level systems and Ramsey-style measurements are ubiquitous. However, in many cases excess readout noise severely degrades the measurement sensitivity; in particular in sensors based on ensembles of solid-state defect spins. We present a dissipative "spin amplification" protocol that allows one to dramatically improve the sensitivity of such schemes, even in the presence of realistic intrinsic dissipation and noise. Our method is based on exploiting collective (i.e., superradiant) spin decay, an effect that is usually seen as a nuisance because it limits spin-squeezing protocols. We show that our approach can allow a system with a highly imperfect spin readout to approach SQL-like scaling in $N$ within a factor of two, without needing to change the actual readout mechanism. Our ideas are compatible with several state-of-the-art experimental platforms where an ensemble of solid-state spins (NV centers, SiV centers) is coupled to a common microwave or mechanical mode.

equivalent to published version, 21+9 pages, 10+7 figures

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Cited by in corpus (9)

• Squeezed superradiance enables robust entanglement-enhanced metrology even with highly imperfect readout
• Quantum Fluctuation Dynamics of Dispersive Superradiant Pulses in a Hybrid Light-Matter System
• Triggered Superradiance and Inversion Storage in a Hybrid Quantum System
• Maser Threshold Characterization by Resonator Q-Factor Tuning
• Revisiting the impact of dissipation on time-reversed one-axis-twist quantum-sensing protocols
• Intertwining of lasing and superradiance under spintronic pumping
• Self-Induced Superradiant Masing
• Stability of macroscopic spin ensembles against inhomogeneous dephasing
• Dispersive regime of multiphoton qubit-oscillator interactions