Erlangen 2018 – wissenschaftliches Programm

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SYPS: PhD-Symposium

SYPS 1: PhD-Symposium: Floquet Physics - how time-periodic systems can make a difference

SYPS 1.2: Hauptvortrag

Montag, 5. März 2018, 14:30–15:00, RW HS

Experiments on driven quantum gas and surprises — •Cheng Chin — James Franck institute, Enrico Fermi institute and Department of Physics, University of Chicago , 929 E. 57th St., Chicago, IL 60637, USA

How much does one have to perturb a regular Bose-Einstein condensate to display novel behavior? By driving the sample periodically, it turns out that even small modulation suffices to bring about lots of interesting quantum phenomena. In this lecture we will discuss a few cases.

A. Modulation of external potential: When atoms are loaded into a potential with a particular length scale, even weak modulations at a chosen time scale can make a drastic difference. Examples in this lecture will include quantum phase transition and inflation.

B. Modulation of atomic interaction: This is a cool idea that leads to a cool observation. By oscillating the magnetic field near a Feshbach resonance, we see a sudden fireworks-like emission of atoms from a Bose condensate. What is going on, my lord?

C. What if we can modulate both potential and interactions? Share with us your ideas and see you in Erlangen 18.

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