Long-lived metrological spin squeezing Atomic clocks and sensors are among the most precise measurement instruments in the world, but they can still be improved. Indeed, all of them so far use uncorrelated atoms, creating statistical noise known as quantum projection...
The adjustment of fundamental constants: a tool for new physics searches The values of fundamental constants such as the fine-structure constant, the mass of the electron or proton, the Rydberg constant, are determined by a variety of high-precision experiments:...
The final results of the MICROSCOPE mission reach record precision The MICROSCOPE mission has just confirmed the principle of equivalence with a record precision of a few 10-15. It thus proves that bodies fall in vacuum with the same acceleration regardless...
SUPERFLUID HELIUM AND NEGATIVE PRESSURES Low temperature liquid helium-4 is a model material for condensed matter physics for two reasons. First, atomic interactions are weak and quantum effects play an important role on the macroscopic scale. Secondly,...
Fundamental constants: the molecular hydrogen ion joins the play The HD+ molecule, composed of a proton, a deuteron and an electron, is along with its isotopes such as H2+ or D2+, the simplest molecule. As such, it is a valuable tool to test our understanding of...
Connecting the quantum internet 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,...
