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

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dc.creatorDaley, A. J.
dc.creatorClark, S. R.
dc.creatorJaksch, D.
dc.creatorZoller, P.
dc.date2005-06-29
dc.date.accessioned2026-07-07T12:29:19Z
dc.date.available2026-07-07T12:29:19Z
dc.descriptionWe 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.
dc.description10 pages, 14 figures
dc.identifierhttps://arxiv.org/abs/quant-ph/0506256
dc.identifierhttp://arxiv.org/abs/quant-ph/0506256
dc.identifierPhys. Rev. A 72, 043618 (2005)
dc.identifierdoi:10.1103/PhysRevA.72.043618
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/215838
dc.subjectQuantum Physics
dc.subjectSoft Condensed Matter
dc.titleNumerical Analysis of Coherent Many-Body Currents in a Single Atom Transistor
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