Unlocking Heisenberg Sensitivity with Sequential Weak Measurement Preparation

Unlocking Heisenberg Sensitivity with Sequential Weak Measurement Preparation

We propose a state preparation protocol based on sequential measurements of a central spin coupled with a spin ensemble, and investigate the usefulness of the generated multi-spin states for quantum enhanced metrology. Our protocol is shown to generate highly entangled spin states, devoid of the nec...

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Veröffentlicht in:arXiv.org 2024-03
Hauptverfasser: Lantaño, T B, Yang, Dayou, Audenaert, K M R, Huelga, S F, Plenio, M B
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Coupling
Entangled states
Metrology
Sensitivity
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Yang, Dayou
Audenaert, K M R
Huelga, S F
Plenio, M B
description We propose a state preparation protocol based on sequential measurements of a central spin coupled with a spin ensemble, and investigate the usefulness of the generated multi-spin states for quantum enhanced metrology. Our protocol is shown to generate highly entangled spin states, devoid of the necessity for non-linear spin interactions. The metrological sensitivity of the resulting state surpasses the standard quantum limit, reaching the Heisenberg limit under symmetric coupling strength conditions. We also explore asymmetric coupling strengths, identifying specific preparation windows in time for optimal sensitivity. Our findings introduce a novel method for generating large-scale, non-classical, entangled states, enhancing quantum-enhanced metrology within current experimental capabilities.
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subjects Coupling
Entangled states
Metrology
Sensitivity
title Unlocking Heisenberg Sensitivity with Sequential Weak Measurement Preparation
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