The first paper emerging from our collaboration with Carlos was just published in PRL (open access). Zeyu and Oliver showed both analytically and numerically that placing two qubits in a suitably engineered waveguide results in perfect state transfer between the qubits. Whereas a conventional waveguide results in no more than 54% transfer efficiency (see top panel in the image), our new design reaches close to 100% by inverting the pulse shape (see bottom panel).
Paul Mabey from IOP publishing wrote a nice piece in Physics World about our work with Jan Wiersig on the sensing performance of Exceptional Points. Check it out at this link.
Zeyu (right) received the best talk award at the recent Nanophotonics Science Camp in the UK for his talk on “Adiabatic Energy Transfer in Periodically Modulated Time-Varying Media”. Congratulations to Zeyu, pictured receiving the award from Arthur Goetschy (left), who organized the workshop!
Together with Jan Wiersig from Magdeburg/Germany, we just published an article in Reports on Progress in Physics (open access) that combines two research thrusts in our group: Fisher information (FI) and Exceptional Points (EPs). We demonstrate how EPs can enhance the FI and how moving away from the EP can lead to an even greater improvement in measurement precision. Our work establishes a general framework for understanding the role of non-Hermitian degeneracies in parameter estimation and clarifies under which conditions EPs provide genuine metrological advantages.
Marlene Hudler and David Fürlinger successfully defended their master theses with exciting results on spatiotemporal focusing with the Floquet scattering matrix and on matrix imaging for ultrasound localization microscopy – congratulations!
A joint paper with colleagues from Graz and Cardiff has just appeared in Laser & Photonics Reviews. In this work, we develop a resonant-state theory for finite photonic systems that are periodically modulated in time. While these photonic time crystals are often discussed in terms of bulk bandgaps, realistic implementations are finite and open. We show that their dynamics is governed by resonant states (quasinormal modes), revealing how parametric amplification emerges as a resonant process. Congratulations to Adrià, Sergei, David, Egor, Thomas and everyone involved!
Rachel Won from Nature Reviews Electrical Engineering wrote a “research highlight” on the recent NanoMeta conference in Seefeld, in which our group’s research on Fisher Information received a special mention. Thanks Rachel!
David successfully defended his PhD thesis on the Floquet scattering matrix today – congratulations! Many thanks go to our external examinations Emanuele Galiffi (Austin, US) and Henning Schomerus (Lancaster, UK) for evaluating the thesis.
Zheng Gong is visiting us from Xiao Lin’s group at Zhejiang University – welcome to Vienna! Zheng will be working on Fisher information in light scattering and on the interaction of free electrons with laser light.
The BBC podcast series “Crowd Science” picked up a question from listener Ahmed from Libya who asks whether light can be cancelled with light. In the corresponding interviews, the editors also want to know whether our work on the “anti-laser” can solve this problem. If you’re interested, check out the podcast.
