Scaling Laws for the Sensitivity Enhancement of Non-Gaussian Spin States
- 14 October 2021
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 127 (16), 160501
- https://doi.org/10.1103/physrevlett.127.160501
Abstract
We identify the large- scaling of the metrological quantum gain offered by over-squeezed spin states that are accessible by one-axis twisting, as a function of the preparation time. We further determine how the scaling is modified by relevant decoherence processes and predict a discontinuous change of the quantum gain at a critical preparation time that depends on the noise. Our analytical results provide recipes for optimal and feasible implementations of quantum enhancements with non-Gaussian spin states in existing experiments, well beyond the reach of spin squeezing.
Funding Information
- Agence Nationale de la Recherche (ANR-10-LABX-0010, ANR-10-IDEX-0001-02 PSL*)
- European Commission
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