CoQuS II Kick-Off Workshop, also honouring Reinhold Bertlmann's 65th Birthday Mitschnitt einer Veranstaltung von Universität Wien, Technischer Universität Wien und Fonds zur Förderung der wissenschaftlichen Forschung am Donnerstag, dem 30. September 2010 im Christian-Doppler-Hörsaal der Fakultät für Physik der Universität Wien Teil 4. Stephan Schiller (Heinrich-Heine-Universität Düsseldorf): Precision Spectroscopy of Cold Molecular Hydrogen Ions - Towards a Determination of the Electron-to-Proton Mass Ratio The hydrogen molecular ion is a three-body system and thus a fundamental system in quantum mechanics, and has been the subject of extensive theoretical work for over 80 years, with constantly increasing accuracy. The experimental efforts on high-resolution spectroscopy have been more limited, but have yielded several precise measurements of energies. We have developed a molecular hydrogen ion experiment that applies modern techniques of cold gaseous matter manipulation with the aim of reaching significantly higher precision in rotational and vibrational spectroscopy. The overall goal is to use the hydrogen molecular ion for tests of quantum electrodynamics (QED) and the determination of fundamental constants, in particular the electron-to-proton mass ratio. With this goal, our experiment explores a new avenue in the emerging field of fundamental physics with cold molecules. INHALT ====== Kapitel Titel Position --------------------------------------------------------------------- 1. Vorspann 00:00:00 2. Introduction: Molecular hydrogen ions 00:00:25 3. Transitions and their hyperfine structure 00:09:45 4. Ab-initio calculation of energies 00:15:53 5. Systematic effects on transition frequency 00:19:56 6. Sympathetic cooling of HD+ 00:23:39 7. Mass spectroscopy 00:29:42 8. Efficency of optical pumping 00:37:04

Quantenphysik, Spektroskopie

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