The Vienna Doctoral Programme on Complex Quantum Systems
invites you to a
Leibniz Universität Hannover
Quantum atom optics with spinor Bose-Einstein condensates
The creation of coherent particle pairs provides a basic method for the creation of highly nonclassical quantum states. In optics, photon pairs can be created by optical parametric down-conversion, allowing for a large variety of fascinating quantum optics experiments. In our experiments, we study nonclassical quantum states in a Bose-Einstein condensate (BEC) of ultracold Rubidium atoms with a spin degree of freedom. In such a condensate, two atoms may collide and produce an entangled atom pair with two different internal states. This process is perfectly analogous to optical parametric down-conversion. In this talk, I will present the realization of two classic quantum optics experiments – with coherent atomic matter waves. The first part comprises a demonstration of the Quantum Zeno Effect which was originally proposed but never realized with photons. The setup can be used for an interaction-free measurement, where a classical object is detected without interacting with it. In the second part, I will present the creation of a many-particle state that is entangled in the sense of Einstein, Podolsky and Rosen (EPR). For the first time with massive particles, the measured correlations fulfill the continuous-variable EPR criterion.
Monday, 21 November 2016,
16:30h get-together with coffee and snacks!
Lise Meitner Hörsaal, Strudlhofgasse 4, 1st floor, Vienna
The seminar talk will be preceded by a CoQuS Student talk at 17:00h
University of Vienna
Tailored gratings for matter-wave diffraction
Hosted by: Jörg Schmiedmayer