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Issue 1, 2016
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The role of interparticle interaction and environmental coupling in a two-particle open quantum system

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Abstract

The effects of bath coupling on an interacting two-particle quantum system are studied using tools from information theory. Shannon entropies of the one (reduced) and two-particle distribution functions in position, momentum and separable phase-space are examined. Results show that the presence of the bath leads to a delocalization of the distribution functions in position space, and a localization in momentum space. This can be interpreted as a loss of information in position space and a gain of information in momentum space. The entropy sum of the system, in the presence of a bath, is shown to be dependent on the strength of the interparticle potential and also on the strength of the coupling to the bath. The statistical correlation between the particles, and its dependence on the bath and interparticle potential, is examined using mutual information. A stronger repulsive potential between particles, in the presence of the bath, yields a smaller correlation between the particles positions, and a larger one between their momenta.

Graphical abstract: The role of interparticle interaction and environmental coupling in a two-particle open quantum system

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Publication details

The article was received on 02 Oct 2015, accepted on 20 Nov 2015 and first published on 23 Nov 2015


Article type: Paper
DOI: 10.1039/C5CP05927E
Author version available: Download Author version (PDF)
Citation: Phys. Chem. Chem. Phys., 2016,18, 436-447
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    The role of interparticle interaction and environmental coupling in a two-particle open quantum system

    H. G. Laguna, R. P. Sagar, D. G. Tempel and A. Aspuru-Guzik, Phys. Chem. Chem. Phys., 2016, 18, 436
    DOI: 10.1039/C5CP05927E

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