Quantum test of the Universality of Free Fall using rubidium and potassium
Henning Albers, Alexander Herbst, Logan L. Richardson, Hendrik Heine, Dipankar Nath, Jonas Hartwig, Christian Schubert, Christian Vogt, Marian Woltmann, Claus Lämmerzahl, Sven Herrmann, Wolfgang Ertmer, Ernst M. Rasel, Dennis Schlippert
Abstract
Abstract We report on an improved test of the Universality of Free Fall using a rubidium-potassium dual-species matter wave interferometer. We describe our apparatus and detail challenges and solutions relevant when operating a potassium interferometer, as well as systematic effects affecting our measurement. Our determination of the Eötvös ratio yields η Rb,K = −1.9 × 10 −7 with a combined standard uncertainty of σ η = 3.2 × 10 −7 . Graphical abstract
Topics & Concepts
Universality (dynamical systems)RubidiumPotassiumPhysicsQuantumQuantum mechanicsChemistryAtomic physicsMatter waveCondensed matter physicsStatistical physicsThermodynamicsAtom opticsAdvanced Frequency and Time StandardsCold Atom Physics and Bose-Einstein CondensatesAtomic and Subatomic Physics Research