Max F Riedel

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Atom chips provide a versatile quantum laboratory for experiments with ultracold atomic gases. They have been used in diverse experiments involving low-dimensional quantum gases, cavity quantum electrodynamics, atom-surface interactions, and chip-based atomic clocks and interferometers. However, a severe limitation of atom chips is that techniques to(More)
We use a small Bose-Einstein condensate on an atom chip as an interferometric scanning probe to map out a microwave field near the chip surface with a few micrometers resolution. With the use of entanglement between the atoms, our interferometer overcomes the standard quantum limit of interferometry by 4 dB and maintains enhanced performance for(More)
We report the slowing of a supersonic beam by elastic reflection from a receding atomic mirror. We use a pulsed supersonic nozzle to generate a 511+/-9 m/s beam of helium that we slow by reflection from a Si(111)-H(1x1) crystal placed on the tip of a spinning rotor. We were able to reduce the velocity of helium by 246 m/s and show that the temperature of(More)
Nous décrivons la conception et la construction d'une horloge atomique sur une pucè a atomes, visant une stabilité de quelques 10 −13à 1s et une application en tant qu'´ etalon secondaire. Cette horloge est basée sur la transitionà deux photons entre les sous-´ etats hyperfins |1, −1 et |2, 1 de l'´ etat fondamental de l'atome 87 Rb. Elle interroge cette(More)
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