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Pré-Publication, Document De Travail Année : 2019

Sensing magnetic fields with non-gaussian quantum fluctuations

Résumé

The precision of a quantum sensor can overcome its classical counterpart when its constituants are entangled. In gaussian squeezed states, quantum correlations lead to a reduction of the quantum projection noise below the shot noise limit. However, the most sensitive states involve complex non-gaussian quantum fluctuations, making the required measurement protocol challenging. Here we measure the sensitivity of non-classical states of the electronic spin \J=8\ of dysprosium atoms, created using light-induced non-linear spin coupling. Magnetic sublevel resolution enables us to reach the optimal sensitivity of non-gaussian (oversqueezed) states, well above the capability of squeezed states and about half the Heisenberg limit.
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Dates et versions

hal-03746129 , version 1 (04-08-2022)

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  • HAL Id : hal-03746129 , version 1

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Alexandre Evrard, Vasiliy Makhalov, Thomas Chalopin, Leonid A. Sidorenkov, Jean Dalibard, et al.. Sensing magnetic fields with non-gaussian quantum fluctuations. 2019. ⟨hal-03746129⟩
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