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A: Fachverband Atomphysik

A 27: Poster III

A 27.29: Poster

Donnerstag, 9. März 2023, 16:30–19:00, Empore Lichthof

Cavity-mediated correlated pairs in both internal and external degrees of freedom — •Panagiotis Christodoulou, Fabian Finger, Rodrigo Rosa-Medina, Nicola Reiter, Tobias Donner, and Tilman Esslinger — Institute for Quantum Electronics, ETH Zurich, 8093 Zurich, Switzerland

Using a 87Rb spinor Bose-Einstein condensate inside a high-finesse optical cavity, we engineer correlated atom pairs in both their internal (spin) and external (momentum) degree of freedom. This mechanism has intrinsically many similarities with the parametric down-conversion process in optical systems and the binary spin-changing collisions in atom gases, as we verify in a series of experiments. At the same time, this mechanism provides new opportunities, like a deterministic controllability between the underlying coherent and dissipative processes, and an interplay of different intermediate channels for the production of such pairs which we can experimentally distinguish. The produced paired state is well placed to constitute the basis for a number of studies, ranging from proof-of-principle investigations of the mechanism of entanglement to fast quantum-enhanced interferometry to generating many-body models relevant to Quantum Information theory.