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 Klempt¹ — ¹Institut 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.