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Biophysical interfaces involve electrolytic media such as salt water where Debye screening due to moving ions is extremely effective. It was therefore commonly believed that interactions induced by electromagnetic fluctuations could not give rise to...
During the past decades, scientists have tried solving problems that take a long time with conventional computers. Recently, it has been demonstrated that quite a few of these problems can be written as a variation of what is called an Ising spin...
The CNRS Medal for Scientific Mediation rewards men and women, scientists or research support staff, for their actions, whether one-off or ongoing, personal or collective, to promote science in society.
Les recherches de Jean Dalibard se situent au cœur de la physique quantique : il est internationalement reconnu comme l’un des chefs de file du domaine des gaz quantiques, notamment des condensats de Bose-Einstein, un état particulier de la matière à très basse température.
Experiments performed the Quantum Optics team show that dark solitons in a quantum fluid of polariton quasiparticles can bind together to form a soliton molecule
Un effet quantique mis en évidence pour la première fois dans les détecteurs d’ondes gravitationnelles Advanced Virgo et Advanced LIGO
Media and even politics regularly talk about quantum technologies as one of the big upcoming innovations. It is even said that we are going through a quantum revolution. But did you know that most modern technologies that we use on a daily basis already rely on...
Mise à jour d’une propriété de topologie non triviale des états quantiques
The Bose-Einstein condensate team has studied the dynamics of dysprosium atoms manipulated by lasers, aiming to simulate the behavior of electrons in a magnetic field, which feature a quantum Hall effect. We used two-photon transitions to couple the atomic motion and...
LIGO and Virgo Gravitational Wave Detectors’ biggest catch to date on the board
A collaboration between researchers from Vrije Universiteit, LKB and the Joint Institute for Nuclear Research determined the proton-electron mass ratio with 11 significant digits !
Researchers from LKB and CNR (Florence, Italy) have developed a theoretical method that characterizes the squeezing of multiple quantum observables
Researchers at the Kastler Brossel Laboratory in Paris have succeeded in implementing a novel “hybrid” entanglement swapping protocol, bringing within reach the connection of disparate platforms in a future, heterogeneously-structured, quantum internet.
New ERC Consolidator grant
A new article from the Complex Media Optics team published in Nature photonics
For the first time, physicists of Kastler Brossel Laboratory have been able to use light to trap giant atoms, so-called circular Rydberg atoms.
The Maria Skłodowska and Pierre Curie Polish–French Scientific Award is a new joint initiative of the Foundation for Polish Science, the French Ministry of Higher Education, Research and Innovation (MESRI), and the French Academy of Sciences. The aim of the...
Valentina Parigi, teacher-researcher in the Quantum Optics team of the Kastler Brossel Laboratory in Jussieu (Sorbonne University/CNRS/ENS-PSL/Collège de France), has just been awarded with a bronze medal of the CNRS. This award honours the early work of researchers...
Bose-Einstein condensates team of our lab study the loss of spatial coherence of bosonic atoms in an optical lattice when subjected to a controlled amount of spontaneous emission. Ytterbium atoms are promoted to an excited state by a near-resonant laser and decay...
A frequency comb as a platform for quantum information processing
François Nez receives a SFP award
Optimizing the variance of the fluorescent signal
The integration of cold atoms with nanoscopic waveguides has sparked considerable interest in recent years, giving rise to a rapidly expanding field of research: quantum electrodynamics in waveguides. Such platforms should allow easier integration and better...
SFP announces its 2018 Young Investigators Award
On May 15, 2019, during the Rendez-vous optique photonique, the Jean Jerphagnon prize was awarded to Sylvain Gigan, Professor at Sorbonne University and head of the Optical Imaging and Applications to complex and Biological media team at LKB. This prize is intended to...
The animation “1 chercheur-e 1 manip” explores the detection of gravitational waves
Record-fast speeds make spontaneous Raman spectroscopy more practical for biomedical applications
Theorists from LKB and LPS have developped a new method for computing properties of many fermions that interact strongly. The first results agree with experimental measurements on ultracold atomic gases. The development of such a method is important for several...
A new experimental platform to study “liquid light”
Quantum Flagship is a European initiative to develop quantum technologies in Europe. It was officially inaugurated at a ceremony on 29 October 2018 in Vienna, Austria. This programme is already one of the most ambitious in the European Union, with a budget of €1...
The SFO rewards Claude Fabre for all his research
Quentin Glorieux et Alberto Bramati
A record efficiency of 70%
Christophe Salomon, director of research at CNRS, was elected in December 2017 member of Sciences academy (Paris, France), in the physics section. He is a member of the Kastler Brossel Laboratory, head of the Ultracold Fermi Gases team. Christophe Salomon...
Liquid helium 4 is the first physical system that has led to the observation of the fascinating macroscopic quantum phenomenon that is superfluidity. Although its superfluid phase has been studied extensively for almost a century, it still exhibits some fundamental...
First results of the MICROSCOPE satellite confirm the validity of the equivalence principle at an unprecedented precision
First results of the MICROSCOPE satellite of CNES, equipped with ONERA accelerometers, show with an improved precision that bodies fall in a universal way in vacuum. This is a new confirmation of general relativity, the theory proposed one century ago by Albert...
We know that light, and a wave in general, propagates in straight lines in homogeneous transparent media. If the medium is perturbated, however, the light is deviated. Similarly, clouds, made of small droplets of water in suspension, appears milky, since every...
First observation of a Binary Neutron Star Merger
Advanced Virgo allows significantly greater sky localisation of astrophysical sources of gravitational waves
Bose-Einstein Condensation biennial
Science in motion with Tarik Yefsah
Sound attenuation in a superfluid
Alain Aspect and Michel Brune
In the September 23th issue of the Physical Review Letters, Prof. Julien Laurat and his team report they have managed to realize an efficient mirror constituted of only 2000 atoms.
Again, the “deuteron radius” is smaller than expected anfd in good agreement with the “proton radius” deduced from muonic hydrogen spectroscopy, thus reinforcing the “proton radius puzzle”.
Des physiciens viennent de réaliser un électromètre ultrasensible qui repose sur l’utilisation d’atomes excités portés dans une superposition d’états de type “chat de Schrödinger.”