Mainz 2017 – scientific programme

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A: Fachverband Atomphysik

A 31: Poster Session III

A 31.6: Poster

Thursday, March 9, 2017, 17:00–19:00, P OG1

Realization of a Quantum Galvanometer — •Malte Reinschmidt, Carola Rogulj, Peter Federsel, Lukas Gussmann, Andreas Günter, and József Fortágh — Physikalisches Institut, Universität Tübingen, Germany

Developing new quantum sensors is the biggest challenge in today*s quantum technology. Thereby, quantum fluctuations play an important role as they provide direct access to the quantum information of a system. Our goal is to develop a quantum galvanometer, which allows for quantum transport phenomena to be measured in various solid state systems such as quantum dots or topological insulators. In a first attempt, we are planning to realize the quantum galvanometer by coupling a current driven nanomechanical oscillator to a Bose-Einstein condensate. The correlations in the electron current should then be transferred onto an atom laser, which we measure with single atom sensitivity.

We show the current status of the experiment, including the realization and characterization of the nanomechanical oscillator, and its implementation to a cold-atom apparatus. We also give insight into the ion-optical detection system and its sensitivity with respect to electro-magnetic field fluctuations. Using fluctuating microwave fields, we show that field correlations are coherently transferred onto the atom laser and can be reconstructed from the single atom detection signal.