Lab. Kastler Brossel

Les capteurs quantiques sont plus précis quand ils agissent « collectivement » Deux équipes, française et suisse, ont mis au point un réseau de capteurs quantiques permettant de franchir une limite dans la précision des mesures.

📰 À lire dans @lemonde.fr : Les capteurs quantiques sont plus précis quand ils agissent « collectivement » ( interview de Alice Sinatra)

📢 New publication from the Bose–Einstein Condensates team in Physical Review Letters : “Following a Short-Range Correlation Surge”

👉 To learn more : journals.aps.org/prl/abstract...

@college-de-france.fr

Séminaires du LKB - Laboratoire Kastler Brossel Situé dans le Ve arrondissement de Paris, le Laboratoire Kastler Brossel (LKB) et ses 11 équipes mènent des recherches en physique quantique, allant des tests fondamentaux à leurs applications.

Don't forget to mark your calendars for tomorrow's #LKBseminar! 📅

We're delighted to host Tanja Mehlstäubler from Physikalisch-Technische Bundesanstalt & Leibniz Universität Hannover.

📍 11 a.m. on Februrary 18, 2026

👉 For more information:

Saïda Guellati-Khelifa and her team achieved a precise determination of the fine-structure constant using atom interferometry. They developed an in situ method to probe the wave-vector dispersion as experienced by atoms within the vacuum chamber, using a Bose–Einstein condensate as a moving probe.

One of the experimental results that Hanna Le Jeannic is most proud of dates back to her postdoctoral work at the Niels Bohr Institute in Copenhagen. There, she studied the nonlinear interaction between two photons arriving simultaneously at a two-level quantum emitter.

Pauline Yzombard helped achieve the first laser cooling of trapped negative ions, implementing a decades-old theoretical method just months before the project’s funding ended. Her work revived a long-stalled project and opened new possibilities for precision experiments with anions.

Elisabeth Giacobino is not only the president of the French Physical Society; she also has a rich research career filled with groundbreaking results.
Elisabeth and her team demonstrated that an optical parametric oscillator consisting of a nonlinear crystal pumped by a laser emits twin quantum beams

Nancy Paul and her team performed the first demonstration of a quantum X-ray sensor (microcalorimeter) with an atom composed of antimatter. These experimental techniques open a new window for studying fundamental theories such as quantum electrodynamics.

Valentina Parigi and her team are working at the interface between network science and quantum optics. The team experimentally demonstrated an optical simulator for open quantum systems with complex network environments. This system provided an ideal testbed for studying quantum non-Markovianity.

Mark your calendars for next Wednesday's #LKBseminar!

We're delighted to host Tanja Mehlstäubler from Physikalisch-Technische Bundesanstalt, PTB & Leibniz Universität Hannover.

📍 11 a.m. on February 18, 2026

👉 For more details on this seminar : https://www.lkb.fr/evenements/seminaires-du-lkb/

Alice Sinatra and her team laid the theoretical foundations for a precise sensor network.
By splitting a Bose–Einstein condensate into correlated atomic clouds, they succeeded in jointly measuring physical parameters with a precision exceeding the standard quantum limit.

www.lkb.fr/en/laboratoi...

Today is the International Day of Women and Girls in Science, which means that it is a perfect moment to highlight some of the most striking scientific results obtained by the women in our lab!

@cnrs.fr @college-de-france.fr @normalesup.bsky.social

©picture @sorbonne-universite.fr

🎉 Congratulations to Paul Indelicato, named one of the 2026 Outstanding Referees of the Physical Review journals!

The Outstanding Referee program was instituted in 2008 to recognize scientists who have been exceptionally helpful in assessing manuscripts for publication in the journals.

Normale Sup’ vous ouvre ses portes !

📅 14 février 2026
📍 45 rue d’Ulm et en ligne

👉 Explorez le département de physique de l'ENS en présentiel ou en distantiel de 17h à 17h45 !

Pour s’inscrire aux sessions en ligne ou en présentiel : jpo.ens.psl.eu

@normalesup.bsky.social

Séminaires du LKB - Laboratoire Kastler Brossel Situé dans le Ve arrondissement de Paris, le Laboratoire Kastler Brossel (LKB) et ses 11 équipes mènent des recherches en physique quantique, allant des tests fondamentaux à leurs applications.

Don't forget to mark your calendars for tomorrow's #LKBseminar! 📅

We're delighted to host Anders S. Sørensen from University of Copenhagen (Københavns Universitet).

📍 11 a.m. on Februrary 4, 2026

👉 For more information on this seminar:

📰 Nouvel article de Franck Laloë dans Reflets de la Physique (janvier 2026) : « La mécanique quantique, une merveilleuse théorie… que chacun interprète à sa façon »

👉 L’article est disponible en ligne : www.refletsdelaphysique.fr/articles/ref...

@cnrs.fr @normalesup.bsky.social

Mark your calendars for next Wednesday's #LKBseminar!

We're delighted to host Anders S. Sørensen from University of Copenhagen (Københavns Universitet).

📍 11 a.m. on Februrary 4, 2026

👉 For more details on this seminar : https://www.lkb.fr/evenements/seminaires-du-lkb/

Séminaires du LKB - Laboratoire Kastler Brossel Situé dans le Ve arrondissement de Paris, le Laboratoire Kastler Brossel (LKB) et ses 11 équipes mènent des recherches en physique quantique, allant des tests fondamentaux à leurs applications.

Don't forget to mark your calendars for tomorrow's #LKBseminar! 📅

We're delighted to host Magnus Schlösser from TLK, IAP, KIT.

📍 11 a.m. on January 28, 2026

👉 For more information on this seminar:

Quantum measurements with entangled atomic clouds Researchers at the University of Basel and the Laboratoire Kastler Brossel have demonstrated how quantum mechanical entanglement can be used to measure several physical parameters simultaneously with ...

Entanglement is probably the most puzzling phenomenon observed in quantum systems. A research team @unibas.ch & @lkblab.bsky.social has now shown how entanglement of spatially separated quantum objects can be used to measure several physical parameters simultaneously with greater precision.

Mark your calendars for next Wednesday's #LKBseminar!

We're delighted to host Magnus Schlösser from TLK, IAP, KIT.

📍 11 a.m. on January 28, 2026

👉 For more details on this seminar : https://www.lkb.fr/evenements/seminaires-du-lkb/

Séminaires du LKB - Laboratoire Kastler Brossel Situé dans le Ve arrondissement de Paris, le Laboratoire Kastler Brossel (LKB) et ses 11 équipes mènent des recherches en physique quantique, allant des tests fondamentaux à leurs applications.

Don't forget to mark your calendars for tomorrow's #LKBseminar! 📅

We're delighted to host Jonathan Pritchard from University of Strathclyde.

📍 11 a.m. on January 21, 2026

👉 For more information on this seminar:

Mark your calendars for next Wednesday's #LKBseminar!

We're delighted to host Jonathan Pritchard from University of Strathclyde.

📍 11 a.m. on January 21, 2026

👉 For more details on this seminar : https://www.lkb.fr/evenements/seminaires-du-lkb/

Séminaires du LKB - Laboratoire Kastler Brossel Situé dans le Ve arrondissement de Paris, le Laboratoire Kastler Brossel (LKB) et ses 11 équipes mènent des recherches en physique quantique, allant des tests fondamentaux à leurs applications.

Don't forget to mark your calendars for tomorrow's #LKBseminar! 📅

We're delighted to host Christine Silberhorn from Paderborn University.

📍 11 a.m. on January 14, 2026

👉 For more information on this seminar:

Mark your calendars for next Wednesday's #LKBseminar!

We're delighted to host Christine Silberhorn from Universität Paderborn.

📍 11 a.m. on January 14, 2026

👉 For more details on this seminar : www.lkb.fr/evenements/s...

«Les prix Nobel actuels sont le fruit de grandes décisions passées» : les raisons du succès français en physique Le Français Michel Devoret reçoit ce mercredi la prestigieuse récompense à Stockholm. Sa discipline est la principale pourvoyeuse de prix Nobel pour notre pays : un record qui s’explique par plusieurs...

🔬 The LKB is highlighted in an article by Libération featuring interviews with Thierry Dauxois, Serge Haroche and Alain Aspect.

Feel free to check it out: www.liberation.fr/sciences/les...

@cnrs.fr @normalesup.bsky.social @sorbonne-universite.fr @college-de-france.fr

YouTube video by Académie des sciences 🎙️ Rencontre avec Alain Aspect : de l’Académie des sciences à l’Académie française !

🎙️ Rencontre avec Alain Aspect : son élection à l'Académie française
Nous avons échangé avec Alain Aspect, prix Nobel de physique 2022, membre de l'Académie des sciences, directeur de recherche émérite au CNRS à propos de son élection à l’Académie française.
www.youtube.com/watch?v=h7VT...

Four ensembles of atoms arranged on a square. Within every ensemble, there are three atoms. On the two left ensembles, the central atom is depicted with a yellow torus (circular Rydberg level) and the two outer ones with a red sphere (ground state). In the two left ensembles, the central atom is depicted by a small blue torus (circular level), the left atom as a large green sphere (other Rydberg level) and the right atom as a red sphere. All red-sphere atoms are illuminated by a red beam that represents a laser trap.

I am quite happy to share our latest work from the #Rydberg Atoms team of @lkblab.bsky.social, that just appeared on arXiv, by Yohann Machu and all the Rb team @college-de-france.fr @psl-univ.bsky.social @normalesup.bsky.social @cnrs.fr @sorbonne-universite.fr (1/14)

arxiv.org/abs/2509.24691

Mark your calendars for the next #LKBseminar!
We're delighted to host Juan Pablo Paz, who will be discussing « Quantum information processing with squeezed multiplet».

📍 Collège de France - on 24 september 2025

👉 Explore our website for more details : www.lkb.fr/en/evenement...

Congratulations to physicist Christophe Salomon who has just won a 2025 #BalzanPrize!

This award is related to his work on atoms and ultra-precise measurement of time.

He will receive c.€800K, half of which must then be invested in research.

@lkblab.bsky.social @cnrs.fr

Computational field-resolved coherent chemical imaging Nature Communications - A vibrational spectral phase retrieval approach to broadband CARS spectroscopy is presented, therefore enabling supervised compressive CARS microspectroscopy for...

#NewPaper on the blend of computational microscopy with chemical imaging: enabling high-speed quantitative CARS imaging via a new compressive Raman framework.
Kudos @spzhao0724.bsky.social
A collaboration between @lkblab.bsky.social and @ukmlv.bsky.social from Washington Uni St.Louis rdcu.be/eCjLz