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Numerical Analysis of Coherent Many-Body Currents in a Single Atom Transistor


Reference:

Daley, A. J., Clark, S. R., Jaksch, D. and Zoller, P., 2005. Numerical Analysis of Coherent Many-Body Currents in a Single Atom Transistor. Physical Review A: Atomic, Molecular, and Optical Physics, 72 (4), 043618.

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    Official URL:

    http://journals.aps.org/pra/abstract/10.1103/PhysRevA.72.043618

    Abstract

    We study the dynamics of many atoms in the recently proposed Single Atom Transistor setup [A. Micheli, A. J. Daley, D. Jaksch, and P. Zoller, Phys. Rev. Lett. 93, 140408 (2004)] using recently developed numerical methods. In this setup, a localised spin 1/2 impurity is used to switch the transport of atoms in a 1D optical lattice: in one state the impurity is transparent to probe atoms, but in the other acts as a single atom mirror. We calculate time-dependent currents for bosons passing the impurity atom, and find interesting many body effects. These include substantially different transport properties for bosons in the strongly interacting (Tonks) regime when compared with fermions, and an unexpected decrease in the current when weakly interacting probe atoms are initially accelerated to a non-zero mean momentum. We also provide more insight into the application of our numerical methods to this system, and discuss open questions about the currents approached by the system on long timescales.

    Details

    Item Type Articles
    CreatorsDaley, A. J., Clark, S. R., Jaksch, D. and Zoller, P.
    DOI10.1103/PhysRevA.72.043618
    Uncontrolled Keywordsquant-ph,cond-mat.soft
    DepartmentsFaculty of Science > Physics
    Publisher Statement0506256v1: This is an Accepted Manuscript of an article published by the American Physical Society. The published version is available at: http://journals.aps.org/pra/abstract/10.1103/PhysRevA.72.043618
    RefereedYes
    StatusPublished
    ID Code47322

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