Article "Electric moments in molecule interferometry" by Sandra Eibenberger et al. chosen by IoP Select
04. May 2011 — The article "Electric moments in molecule interferometry" in NJP by Sandra Eibenberger, Stefan Gerlich, Markus Arndt, Jens Tüxen and Marcel Mayor was chosen by IoP Select*
Abstract: We investigate the influence of different electric moments on the shift and dephasing of molecules in a matter wave interferometer. Firstly, we provide a quantitative comparison of two molecules that are non-polar yet polarizable in their thermal ground state and that differ in their stiffness and response to thermal excitations. While C25H20 is rather rigid, its larger derivative C49H16F52 is additionally equipped with floppy side chains and vibrationally activated dipole moment variations. Secondly, we elucidate the role of a permanent electric dipole momentby contrasting the quantum interference pattern of a (nearly) non-polar and a polar porphyrin derivative. We find that a high molecular polarizability and even sizeable dipole moment fluctuations are still well compatible with high-contrast quantum interference fringes. The presence of permanent electric dipole moments, however, can lead to a dephasing and rapid degradation of the quantum fringe pattern already at moderate electric fields. This finding is of high relevance for coherence experiments with large organic molecules, which are generally equipped with strong electric moments.
Electric moments in molecule interferometry
Sandra Eibenberger, Stefan Gerlich, Markus Arndt, Jens Tüxen and Marcel Mayor
New J. Phys. 13 043033 doi: 10.1088/1367-2630/13/4/043033
*IoP Select is a special collection of journal articles, chosen by the Editors based on one or more of the following criteria: - Substantial advances or significant breakthroughs - A high degree of novelty - Significant impact on future research