Collège de France

About: Collège de France is a education organization based out in Paris, France. It is known for research contribution in the topics: Population & Receptor. The organization has 6541 authors who have published 11983 publications receiving 648742 citations. The organization is also known as: College de France.

Superconducting quantum node for entanglement and storage of microwave radiation.

Abstract: Superconducting circuits and microwave signals are good candidates to realize quantum networks, which are the backbone of quantum computers. We have realized a quantum node based on a 3D microwave superconducting cavity parametrically coupled to a transmission line by a Josephson ring modulator. We first demonstrate the time-controlled capture, storage, and retrieval of an optimally shaped propagating microwave field, with an efficiency as high as 80%. We then demonstrate a second essential ability, which is the time-controlled generation of an entangled state distributed between the node and a microwave channel.

Receptive field characteristics and plastic properties of visual cortical cells in kittens reared with or without visual experience.

Abstract: The functional organization of visual cortical cells was studied in two groups of five week old kittens: one group normally reared, the other reared in total darkness from the third day after birth. The following results were obtained: 1. The cells of the normally reared kittens were similar to adult cells except for some aspects of immaturity. In contrast, the cells of the dark-reared kittens were totally non-specific. Their receptive field showed neither orientational nor directional properties. 2. The distribution of cells according to the ocular dominance was not different in either group and was similar to that previously described for ‘adult’ cells. 3. A few hours of visual experience was sufficient to provide specific receptive field properties to the cortical cells of a dark-reared kitten. 4. Conditioning exposure with an oriented grating induced changes in orientational sensitivity in normally reared kittens but not in dark-reared kittens.

Impuretés magnétiques et effet Kondo

Abstract: L'evolution des theories de l'effet Kondo au cours des dernieres annees est brievement resumee. Un accent particulier est mis sur les effets de degenerescence orbitale dans les metaux reels, et sur les effets d'interaction et de saturation dans les alliages de concentration finie.

Phasmids : a new class of liquid crystals

Abstract: Two hexa-alkoxy derivatives (7a and 7b) of terephthal-bis-[4-benzoyloxyaniline] are described. They exhibit two new types of mesophase for which the term phasmidic is proposed: one has an hexagonal 2D lattice and the second an oblique 2D lattice Description de deux derives hexaalcoxy de la terephtal-bis-[benzoyloxy-4-aniline], presentent deux nouveaux types de mesophase. L'une de ces phases possede un reseau bidimensionnel hexagonal, l'autre un reseau bidimensionnel oblique