Seminare


Seminare

In unregelmäßigen Abständen finden am MPQ Seminare statt. Diese werden von den Wissenschaftlern der einzelnen Abteilungen organisiert. Der Veranstaltungsort wird mit dem jeweiligen Seminar bekannt gegeben.

"Mid-Infrared (Bio)Photonics: From Emerging Tool to Enabling Technology" (Prof. Boris Mizaikoff)

Vibrational spectroscopies - and especially infrared spectroscopy - play an increasingly importantrole in modern biodiagnostics, environmental analysis, and food safety/quality scenarios. This hasled to the evolution of mid-infrared photonics from an emerging tool into an enabling technology.With applications ranging from non-invasive exhaled breath analysis to in-vivo assessment ofcartilage damage, mid-infrared (MIR; 3-20 μm) photonics ranges among the most flexible molecularsensing platforms nowadays available. In particular, with the emergence of quantum and interbandcascade laser technology, the on-chip hybridization and/or integration of entire MIR sensingdevices is on the horizon ultimately leading to IR-lab-on-chip systems. [mehr]
Precision measurements of the Rydberg spectra of H, He and H2 will be presented, which aim at determining their ionization energies and, in the case of H2, also the spin-rovibrational energy-level structure of H2+. These measurements are carried out for comparison with the results of first-principles calculations that include the treatment of finite-nuclear-size effects and relativistic and quantum-electrodynamics corrections up to high order in the fine-structure constant. [mehr]
The field of quantum computation heavily relies on the belief that quantum computation violates the extended Church Turing thesis, namely, that quantum many-body systems cannot be simulated by classical ones with only polynomial overhead. Importantly, we must ask: what experimental evidence do we have for this bold assumption? A major effort towards providing such evidence had concentrated on random quantum circuit sampling (RCS) as in the famous supremacy experiment by Google from 2019. I will describe a recent work with Gao, Landau, Liu and Vazirani in which we give a polynomial time classical algorithm for simulating such RCS experiments. Our algorithm gives strong evidence that RCS cannot be the basis for near term experimental evidence for scalable exponential quantum advantage. [mehr]
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