Nous proposons de tirer parti du très faible couplage du spin nucléaire de l’hélium 3 fondamental à son environnement pour produire des états quantiques macroscopiques à très longue durée de vie, ici des états comprimés du spin nucléaire, dans un gaz en cellule à température ordinaire. Pour effectuer une mesure quantique non destructive sur une composante transverse du spin nucléaire collectif préalablement polarisé, on allume temporairement une décharge dans le gaz, ce qui peuple l’état métastable de l’hélium 3. Le spin collectif correspondant au niveau
We propose to take advantage of the very weak coupling of the ground-state helium-3 nuclear spin to its environment to produce very long-lived macroscopic quantum states, here nuclear spin squeezed states, in a gas cell at room temperature. To perform a quantum non-demolition measurement of a transverse component of the previously polarized collective nuclear spin, a discharge is temporarily switched on in the gas, which populates helium-3 metastable state. The collective spin corresponding to the
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Keywords: Spin squeezing, Helium-3, Nuclear spin, Quantum metrology, Stochastic wave functions
Alan Serafin 1 ; Yvan Castin 1 ; Matteo Fadel 2 ; Philipp Treutlein 2 ; Alice Sinatra 1

@article{CRPHYS_2021__22_1_1_0, author = {Alan Serafin and Yvan Castin and Matteo Fadel and Philipp Treutlein and Alice Sinatra}, title = {\'Etude th\'eorique de la compression de spin nucl\'eaire par mesure quantique non destructive en continu}, journal = {Comptes Rendus. Physique}, pages = {1--35}, publisher = {Acad\'emie des sciences, Paris}, volume = {22}, number = {1}, year = {2021}, doi = {10.5802/crphys.71}, language = {fr}, }
TY - JOUR AU - Alan Serafin AU - Yvan Castin AU - Matteo Fadel AU - Philipp Treutlein AU - Alice Sinatra TI - Étude théorique de la compression de spin nucléaire par mesure quantique non destructive en continu JO - Comptes Rendus. Physique PY - 2021 SP - 1 EP - 35 VL - 22 IS - 1 PB - Académie des sciences, Paris DO - 10.5802/crphys.71 LA - fr ID - CRPHYS_2021__22_1_1_0 ER -
%0 Journal Article %A Alan Serafin %A Yvan Castin %A Matteo Fadel %A Philipp Treutlein %A Alice Sinatra %T Étude théorique de la compression de spin nucléaire par mesure quantique non destructive en continu %J Comptes Rendus. Physique %D 2021 %P 1-35 %V 22 %N 1 %I Académie des sciences, Paris %R 10.5802/crphys.71 %G fr %F CRPHYS_2021__22_1_1_0
Alan Serafin; Yvan Castin; Matteo Fadel; Philipp Treutlein; Alice Sinatra. Étude théorique de la compression de spin nucléaire par mesure quantique non destructive en continu. Comptes Rendus. Physique, Volume 22 (2021) no. 1, pp. 1-35. doi : 10.5802/crphys.71. https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.71/
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