We investigate the dynamics of a $^{40}$K impurity in a $^{6}$Li Fermi sea after a quench into the strongly interacting regime. Using atom interferometry, we observe the formation dynamics of both the attractive and the repulsive polarons. For resonant $^{40}$K-$^{6}$Li interactions, we observe quantum beats due to a simultaneous excitation of the upper and lower branches of the interacting many-body system.
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Authors
Marko Cetina
Institute for Experimental Physics, Innsbruck University and Institute for Quantum Optics and Quantum Information, Innsbruck
Michael Jag
Institute for Experimental Physics, Innsbruck University and Institute for Quantum Optics and Quantum Information, Innsbruck
Rianne Lous
Institute for Experimental Physics, Innsbruck University and Institute for Quantum Optics and Quantum Information, Innsbruck
Isabella Fritsche
Institute for Experimental Physics, Innsbruck University and Institute for Quantum Optics and Quantum Information, Innsbruck
Georg Bruun
Department of Physics and Astronomy, University of Aarhus
Rasmus Christensen
Department of Physics and Astronomy, University of Aarhus
Meera Parish
School of Physics and Astronomy, Monash University
Jesper Levinsen
School of Physics and Astronomy, Monash University
Rudolf Grimm
Institute for Experimental Physics, Innsbruck University and Institute for Quantum Optics and Quantum Information, Innsbruck
