Experiment demonstrating KPZ universality in a two-dimensional system in space and time (IMAGE)

University of Würzburg

Experiment demonstrating KPZ universality in a two-dimensional system in space and time

Caption

Rendering of a GaAs-based semiconductor sample approximately 20 micrometers in size. Following laser excitation, polaritons form in the central (purple) layer and leave the quantum system after a few picoseconds as light with a different wavelength (visible as a diffuse red glow at the edges). Mirror layers above and below the purple layer reflect the polaritons, enabling their positions to be measured as a function of space and time. The image visualizes the spatial correlations within the quantum system, represented by the height of the towers and the white connecting lines. With this experiment, Würzburg researchers from the Cluster of Excellence ctd.qmat have, for the first time ever, demonstrated KPZ universality in a two-dimensional system in space and time.

Credit

© think-design | Jochen Thamm

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