Mainz 2017 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 53: Poster: Quantum Optics and Photonics III

Q 53.4: Poster

Thursday, March 9, 2017, 17:00–19:00, P OG2

Magnetic field control for new periodic driving schemes in optical lattices — •Tobias Klafka, Alexander Ilin, Julius Seeger, Christoph Ölschläger, Juliette Simonet, and Klaus Sengstock — Institut für Laserphysik, Universität Hamburg

For quantum gas experiments, an improved control over the magnetic field allows implementing new driving schemes for Floquet engineering. In particular, this becomes important when internal atomic states are coherently coupled. In spin-dependent hexagonal lattices, magnetic fields can be used to open the Dirac cones in a controlled manner.

We report on the setup of an active compensation for stray magnetic fields which can be implemented in nearly any quantum gas experiment. DC and AC magnetic fields can be attenuated below 1mG for frequencies up to 1kHz. The magnetic field stability has been characterized using Ramsey spectroscopy of a Bose-Einstein condensate.