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Phase-coherence in ultracold atoms trapped by double-well potentials is experimentally investigated by taking absorption images of the freely expanding atomic cloud after trap release. We propose a theoretical expression for the spatial density profiles obtained in this way that is
based on the standard POVM approach to quantum measurement processes and discuss it with respect to the existing experimental evidence.
ADVANCED SCIENCE LETTERS is an international peer-reviewed journal with a very wide-ranging coverage, consolidates research activities in all areas of (1) Physical Sciences, (2) Biological Sciences, (3) Mathematical Sciences, (4) Engineering, (5) Computer and Information Sciences, and (6) Geosciences to publish original short communications, full research papers and timely brief (mini) reviews with authors photo and biography encompassing the basic and applied research and current developments in educational aspects of these scientific areas.