[Compression de la lumière avec des interfaces optomécaniques et lumière-spin quantiques]
We investigate squeezing of light through quantum-noise-limited interactions with two different material systems: an ultracold atomic spin ensemble and a micromechanical membrane. Both systems feature a light-matter quantum interface that we exploit, respectively, to generate polarization squeezing of light through Faraday interaction with the collective atomic spin precession, and ponderomotive quadrature squeezing of light through radiation pressure interaction with the membrane vibrations in an optical cavity. Both experiments are described in a common theoretical framework, highlighting the conceptual similarities between them. The observation of squeezing certifies light-matter coupling with large quantum cooperativity, a prerequisite for applications in quantum science and technology. In our experiments, we obtain a maximal cooperativity of Cqu = 10 for the spin and Cqu = 9 for the membrane. In particular, our results pave the way for hybrid quantum systems where spin and mechanical degrees of freedom are coherently coupled via light, enabling new protocols for quantum state transfer and entanglement generation over macroscopic distances.
Nous étudions la compression de la lumière à travers deux systèmes distincts limités par le bruit quantique : un ensemble de spins atomiques ultrafroids et une membrane micromécanique. Ces deux systèmes possèdent une interface quantique lumière-matière. Nous utilisons cette interface pour générer, d’une part, une compression de la polarisation de la lumière par interaction de Faraday grâce à la précession collective du spin atomique, et d’autre part, une compression des quadratures de la lumière via l’interaction de pression de radiation avec les vibrations de la membrane dans une cavité optique. Les deux expériences sont décrites dans un cadre théorique commun, mettant en évidence leurs similarités conceptuelles. L’observation de la compression atteste d’un couplage lumière-matière avec une grande coopérativité quantique, une condition essentielle pour les applications en science et les technologies quantiques. Dans nos expériences, nous obtenons une coopérativité maximale de Cqu = 10 pour le spin et Cqu = 9 pour la membrane. En particulier, nos résultats ouvrent la voie à des systèmes quantiques hybrides où les degrés de liberté spin et mécaniques sont couplés de manière cohérente via la lumière, permettant de nouveaux protocoles de transfert d’états quantiques et de génération d’intrication sur de grandes distances.
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Mots-clés : Système quantique hybride, états comprimés, système atomique, optomécanique, interaction lumière-matière
Gian-Luca Schmid 1 ; Manel Bosch Aguilera 1 ; Chun Tat Ngai 1 ; Maryse Ernzer 1 ; Luiz Couto Correa Pinto Filho 2, 3 ; Dennis Høj 2 ; Ulrik Lund Andersen 2 ; Florian Goschin 4 ; Philipp Treutlein 1
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@article{CRPHYS_2025__26_G1_641_0,
author = {Gian-Luca Schmid and Manel Bosch Aguilera and Chun Tat Ngai and Maryse Ernzer and Luiz Couto Correa Pinto Filho and Dennis H{\o}j and Ulrik Lund Andersen and Florian Goschin and Philipp Treutlein},
title = {Squeezing light with optomechanical and spin-light quantum interfaces},
journal = {Comptes Rendus. Physique},
pages = {641--657},
year = {2025},
publisher = {Acad\'emie des sciences, Paris},
volume = {26},
doi = {10.5802/crphys.265},
language = {en},
}
TY - JOUR AU - Gian-Luca Schmid AU - Manel Bosch Aguilera AU - Chun Tat Ngai AU - Maryse Ernzer AU - Luiz Couto Correa Pinto Filho AU - Dennis Høj AU - Ulrik Lund Andersen AU - Florian Goschin AU - Philipp Treutlein TI - Squeezing light with optomechanical and spin-light quantum interfaces JO - Comptes Rendus. Physique PY - 2025 SP - 641 EP - 657 VL - 26 PB - Académie des sciences, Paris DO - 10.5802/crphys.265 LA - en ID - CRPHYS_2025__26_G1_641_0 ER -
%0 Journal Article %A Gian-Luca Schmid %A Manel Bosch Aguilera %A Chun Tat Ngai %A Maryse Ernzer %A Luiz Couto Correa Pinto Filho %A Dennis Høj %A Ulrik Lund Andersen %A Florian Goschin %A Philipp Treutlein %T Squeezing light with optomechanical and spin-light quantum interfaces %J Comptes Rendus. Physique %D 2025 %P 641-657 %V 26 %I Académie des sciences, Paris %R 10.5802/crphys.265 %G en %F CRPHYS_2025__26_G1_641_0
Gian-Luca Schmid; Manel Bosch Aguilera; Chun Tat Ngai; Maryse Ernzer; Luiz Couto Correa Pinto Filho; Dennis Høj; Ulrik Lund Andersen; Florian Goschin; Philipp Treutlein. Squeezing light with optomechanical and spin-light quantum interfaces. Comptes Rendus. Physique, Volume 26 (2025), pp. 641-657. doi: 10.5802/crphys.265
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