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Mainz 2017 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 3: Quantum Effects: QED I

Q 3.7: Talk

Monday, March 6, 2017, 16:00–16:15, P 4

Dynamical Casimir effect in a spinor BEC — •Karsten Lange1, Jan Peise1, Bernd Lücke1, Ilka Kruse1, Frank Deuretzbacher2, Luis Santos2, Wolfgang Ertmer1, and Carsten Klempt11Institut für Quantenoptik, Leibniz Universität Hannover — 2Institut für Theoretische Physik, Leibniz Universität Hannover

One of the most surprising predictions of quantum theory is the generation of particles out of the vacuum by suddenly changing the boundary conditions. This effect is known as the dynamical Casimir effect. Originally, it was proposed for mirrors that move at relativistic speeds. We realize an analogous effect in our 87Rb spinor BEC by changing the the energy of initially empty spin modes. Firstly, we demonstrate the creation of spin excitations in these vacuum states. Secondly, we employ atomic homodyning to prove that the created excitations are entangled.

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