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A remarkable progress has recently been achieved in studies of thermodynamics and heat machines, with experiments probing down to micro and nano-scale systems such as the single Brownian particle [1], as well as the single atom [2]. However, despite several theoretical proposals [3, 4], implementation of heat machines in the fully quantum regime remains a challenge. We report on an experimental realization...
Moderne Experimente bestätigen die Gesetze der Quantenmechanik auf immer größeren Skalen. Dabei stellt sich die Frage, wo der Übergang vom quantenmechanischen zum klassischen Verhalten stattfindet und ob das quantenmechanische Superpositionsprinzip seine Gültigkeit verliert. Wir haben ein Maß vorgeschlagen, das es ermöglicht, unterschiedliche quantenmechanische Experimente danach zu bewerten, wie...
We consider various effects that are encountered in matter wave interference experiments with massive nanoparticles. The text-book example of far-field interference at a grating is compared with diffraction into the dark field behind an opaque aperture, commonly designated as Poisson’s spot or the spot of Arago. Our estimates indicate that both phenomena may still be observed in a mass range exceeding...
We discuss new de Broglie coherence experiments in a near-field molecule interferometer with a variety of large organic molecules. While de Broglie coherence is to first order only associated with the center-of-mass motion of the diffracted particle, we here investigate the question as to which extent the internal molecular property is relevant for, compatible with or detrimental for maintaining coherence...
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