Stuttgart 2012 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 10: Interaction with strong or short laser pulses II
A 10.6: Vortrag
Montag, 12. März 2012, 17:45–18:00, V55.01
(contribution withdrawn) Decoherence and energy increase in attosecond neutron-atom collisions — •C. Aris Dreismann1, Evan MacA. Gray2,3, and Tom P. Blach2,3 — 1Institute of Chemistry, TU Berlin — 2Griffith University, Brisbane, Australia — 3Queensland Micro- and Nanotechnology Centre, Australia
Due to the prevailing interactions, nuclei and electrons in condensed matter or molecules are usually entangled. However the "environment" of a microscopic system (e.g. a proton in a H2 molecule) may cause an ultrafast decoherence thus making atomic and/or nuclear entanglement effects not directly accessible to experiments. For neutron Compton scattering (NCS) in the energy transfer range of ca. 1-100 eV, the neutron-H scattering time lies in the attosecond time range. Results of recent and current NCS experiments [1] from H2 and D2 in the gas (at 40 K), liquid and solid state are reported, showing that the neutron-atom collision exhibits a striking increased energy transfer which stands in blatant contradiction to conventional theory. The experimental NCS setup is shortly introduced. The theoretical frame of "attosecond scattering from open quantum systems" is discussed", with particular focus on the decoherence process as described by the standard Lindblad equation and recent modern theoretical models [2,3].
[1] C. A. Chatzidimitriou-Dreismann, E. MacA. Gray and T. P. Blach, AIP Advances 1 (2011) 022118. [2] L. S. Schulman and B. Gaveau, Phys. Rev. Lett. 97 (2006) 240405. [3] N. Erez et al. Nature 452 (2008) 724.