Matter wave pulses characteristics

We study the properties of quantum single-particle wave pulses created by sharp-edged or apodized shutters with single or periodic openings. In particular, we examine the visibility of diffraction fringes depending on evolution time and temperature; the purity of the state depending on the opening-time window; the accuracy of a simplified description which uses ``source'' boundary conditions instead of solving an initial value problem; and the effects of apodization on the energy width.Comment: 11 pages, 11 figure

Photoluminescence of [Sn₆O₄(OCH₃)₄]

The hexameric complex [Sn6O4(OCH34] shows a low temperature (77 K) photoluminescence of moderate intensity at λmax=565nm. This emission is assumed to originate from a metal-centered sp excited state which is modified by metal-metal interaction in the octahedral Sn(II)6 cluster