Unlocking Heisenberg Sensitivity with Sequential Weak Measurement Preparation

• URL: http://arxiv.org/abs/2403.05954v2
• Date: Wed, 13 Mar 2024 19:41:49 GMT
• Title: Unlocking Heisenberg Sensitivity with Sequential Weak Measurement Preparation
• Authors: T. B. Lantaño, Dayou Yang, K. M. R. Audenaert, S. F. Huelga, M. B. Plenio,
• Abstract summary: We generate entangled spin states devoid of the necessity for non-linear spin interactions. The metrological sensitivity of the resulting state surpasses the standard quantum limit. Our findings introduce a novel method for generating large-scale, non-classical, entangled states.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: 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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