%0 Generic %1 evrard2019sensing %A Evrard, Alexandre %A Makhalov, Vasiliy %A Chalopin, Thomas %A Sidorenkov, Leonid A. %A Dalibard, Jean %A Lopes, Raphael %A Nascimbene, Sylvain %D 2019 %K experiment quantum_metrology %T Sensing magnetic fields with non-gaussian quantum fluctuations %U http://arxiv.org/abs/1901.06282 %X 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.

@misc{evrard2019sensing, abstract = {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.}, added-at = {2019-01-22T08:49:51.000+0100}, author = {Evrard, Alexandre and Makhalov, Vasiliy and Chalopin, Thomas and Sidorenkov, Leonid A. and Dalibard, Jean and Lopes, Raphael and Nascimbene, Sylvain}, biburl = {https://www.bibsonomy.org/bibtex/2ee8b108886a0dcb5aa286426b4feaec7/marschu}, interhash = {a83baf7a9151014694ec0444bc314898}, intrahash = {ee8b108886a0dcb5aa286426b4feaec7}, keywords = {experiment quantum_metrology}, note = {cite arxiv:1901.06282Comment: 11 pages, 10 figures}, timestamp = {2019-01-22T08:49:51.000+0100}, title = {Sensing magnetic fields with non-gaussian quantum fluctuations}, url = {http://arxiv.org/abs/1901.06282}, year = 2019 }