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TT: Fachverband Tiefe Temperaturen

TT 73: Correlated Electrons: Nonequilibrium Quantum Many-Body Systems 2

TT 73.11: Talk

Thursday, March 23, 2017, 17:45–18:00, HSZ 304

Time-resolved correlation functions of the BEC/BCS crossover from many-body Ramsey interferometry — •Johannes Oberreuter¹, Henning Moritz², and Michael Knap¹ — ¹Department of Physics, Walter Schottky Institute and Institute for Advanced Study, Technical University of Munich, 85748 Garching, Germany — ²Institut für Laserphysik, University of Hamburg, 22761 Hamburg, Germany

We propose a local and time-resolved probe to study the BEC/BCS crossover. The protocol is based on Ramsey interferometry between the two participating hyperfine states. We study rotations within the spin components as the third level typically suffers from increased loss. While on the BEC side the local spatial resolution cannot resolve the tightly bound molecules, on the BCS side as well as near unitarity we obtain dynamical information about the relevant scales.