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.

Special Seminar: "Towards cooling of AlCl" (Prof. Börge Hemmerling)

The electric dipole moment of polar molecules and their rich internal structure makes them excellent candidates for applications in precision measurements, controlled ultracold chemistry, and quantum simulations. Many applications require that the molecular sample is cooled to limit the number of occupied quantum states and trapped. [mehr]
Abstract. We discuss the question of how can one treat the laser-induced (or laser-assisted)high-order processes of electrons (bound or free) nonperturbatively, in such a way that boththe electron-atom interaction and the quantized nature of radiation be simultaneously takeninto account? An analytic method is proposed to answer this question in the generalframework of nonrelativistic quantum electrodynamics. As an application, a quantum opticalgeneralization of the strong-field Kramers-Heisenberg formula has been derived fordescribing high-harmonic generation (HHG). [mehr]

"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]
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