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Q: Fachverband Quantenoptik und Photonik

Q 12: Ultra-cold atoms, ions and BEC (with A)

Q 12.18: Poster

Montag, 29. Februar 2016, 16:30–19:00, Empore Lichthof

Atom laser based quantum sensors — •Tobias Menold, Carola Rogulj, Malte Reinschmidt, Peter Federsel, Andreas Günther, 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 new quantum sensor for these quantum fluctuations. Using a quantum state transfer, they are transferred to an atom laser, whose output is measured with single atom
sensitivity.
We demonstrate such a sensor, by transferring the dynamics of an ultra-cold atomic cloud onto an atom laser and reconstructing its dynamics using our time resolved, single atom detection scheme. In a second experiment we transfer classical field noise of a multi-mode microwave field onto the atom laser and analyze its statistics. We find that the atom laser output allows for measuring not only the power spectral density of the noise but also the field correlations.
Using our sensor, a quantum galvanometer comes into direct reach. It should allow the investigation of quantum transport phenomena in various solid state systems.