Category: Scientific publication

A new paper by Max on the flow of Fisher information through artificial neural networks just came out in PRX – congratulations! Many thanks go to our collaborators in Scotland, France and Germany!

Together with Nicholas Lambert, Jevon Longdell, and Harald Schwefel from New Zealand as well as our previous group member Alexander Schumer, we just published a paper in Nature Physics, demonstrating both theoretically and experimentally how to use an exceptional point to control magnon-polaritons. See also the accompanying News&Views from Changhao Meng and Zhenghua An.

In a new paper with Max, Lukas and Günther, recently published in Nature Photonics, we explored how artificial intelligence can extract the maximum possible information from distorted optical signals. Using neural networks trained on seemingly chaotic light patterns, we approached — and nearly reached — the theoretical limit of precision, which we showed to be defined by the Cramér–Rao bound. Many thanks go to our collaborators in France (Dorian Bouchet) and Scotland (Ilya Starshynov and Daniele Faccio) as well as to Oliver for creating the great feature image shown on the top left. Check here for TU Wien’s press release.

Together with the group of Matthieu Davy in Rennes (France) we published a letter in the Physical Review, demonstrating how to optimally focus microwaves on a nonlinear target such as a low-noise amplifier embedded in a disordered environment (see image on the left).

Together with Elena Redchenko and the team of Johannes Fink at ISTA, we just published a Letter in the Physical Review (available through open access) on the observation of periodic microwave pulses being emitted from a multi-qubit ensemble arranged in a spectral frequency comb. Please also check the corresponding press release from TU Wien’s press department.

Together with David and Jakob, we published a new paper in Physical Review A, demonstrating that the Floquet scattering matrix for time-periodic photonic systems satisfies a pseudo-unitarity condition. For more information, check out the paper here.

In collaboration with Ori Katz’s team, we have shown in this Letter how to design an optical cavity such that a weakly absorbing film inside of it can perfectly absorb coherent laser light that is both spatially and spectrally broadband. Congratulations to Helmut and Lena for developing the theory behind this concept and many thanks to Oliver for the nice figure here on top!

Together with Lukas Rachbauer, Dorian Bouchet and Ulf Leonhardt we published an invited tutorial in JOSAB on how to find the optimal quantum states of light for micromanipulation and metrology. The article is openly accessible at this link.

Together with the team of Dave Phillips in Exeter and our former group member Michael Horodynski, we published an article in Science Advances that demonstrates how shaping the wavefront of light can be used to create efficient optical tweezers (i.e., very stiff traps for particles). For more details see the press releases of Exeter University and of the Austrian Press Agency.

In a nice collaboration with the team of Romain Fleury at EPFL and our former Marie-Curie fellow Nicolas Bachelard from Bordeaux, we published an article in Nature Physics that demonstrates how audible sound can be used to steer and rotate objects in complex environments. See the News&Views article by Emmanuel Fort and the highlight in Physics World for more information. Here is also a video on how an origami lotus flower is moved through our sound technique.