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  • Indications of energetic consequences of decoherence at short times for scattering from open quantum systems

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    Author(s)
    Chatzidimitriou-Dreismann, CA
    Gray, E MacA
    Blach, TP
    Griffith University Author(s)
    Gray, Evan M.
    Blach, Tomasz P.
    Year published
    2011
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    Abstract
    Decoherence of quantum entangled particles is observed in most systems, and is usually caused by system-environment interactions. Disentangling two subsystems A and B of a quantum system AB is tantamount to erasure of quantum phase relations between A and B. It is widely believed that this erasure is an innocuous process, which e.g. does not affect the energies of A and B. Surprisingly, recent theoretical investigations by different groups showed that disentangling two systems, i.e. their decoherence, can cause an increase of their energies. Applying this result to the context of neutron Compton scattering from H2 molecules, ...
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    Decoherence of quantum entangled particles is observed in most systems, and is usually caused by system-environment interactions. Disentangling two subsystems A and B of a quantum system AB is tantamount to erasure of quantum phase relations between A and B. It is widely believed that this erasure is an innocuous process, which e.g. does not affect the energies of A and B. Surprisingly, recent theoretical investigations by different groups showed that disentangling two systems, i.e. their decoherence, can cause an increase of their energies. Applying this result to the context of neutron Compton scattering from H2 molecules, we provide for the first time experimental evidence which supports this prediction. The results reveal that the neutron-proton collision leading to the cleavage of the H-H bond in the sub-femtosecond timescale is accompanied by larger energy transfer (by about 3%) than conventional theory predicts. It is proposed to interpreted the results by considering the neutron-proton collisional system as an entangled open quantum system being subject to decoherence owing to the interactions with the "environment" (i.e., two electrons plus second proton of H2).
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    Journal Title
    AIP Advances
    Volume
    1
    Issue
    2
    DOI
    https://doi.org/10.1063/1.3595401
    Copyright Statement
    © The Author(s) 2011. For information about this journal please refer to the publisher’s website or contact the authors. Articles are licensed under the terms of the Creative Commons Attribution 3.0 Unported (CC BY 3.0) license (http://creativecommons.org/licenses/by/3.0/) which permits unrestricted, distribution and reproduction in any medium, providing that the work is properly cited.
    Subject
    Quantum Physics not elsewhere classified
    Optical Physics
    Quantum Physics
    Electrical and Electronic Engineering
    Publication URI
    http://hdl.handle.net/10072/44471
    Collection
    • Journal articles

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