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Mesoscopic transport of fermions through an engineered optical lattice connecting two reservoirs

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2012

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http://nbn-resolving.de/urn:nbn:de:bsz:352-161536
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https://doi.org/10.1103/PhysRevA.85.013623
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Physical Review A. 2012, 85(1). ISSN 1050-2947. Available under: doi: 10.1103/PhysRevA.85.013623

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We study transport of fermions in a system composed of a short optical lattice connecting two finite atomic reservoirs at different filling levels. The average equilibration current through the optical lattice, for strong latticereservoir coupling and finite temperatures, is calculated within the Landauer formalism using a nonequilibrium Green’s functions approach. We moreover determine quantum and thermal fluctuations in the transport and find significant shot-to-shot deviations from the average equilibration current. We show how to control the atomic current by engineering specific optical lattice potentials without requiring site-by-site manipulations and suggest the realization of a single level model. Based on this model we discuss the blocking effect on the atomic current resulting from weak interactions between the fermions.

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ISO 690BRUDERER, Martin, Wolfgang BELZIG, 2012. Mesoscopic transport of fermions through an engineered optical lattice connecting two reservoirs. In: Physical Review A. 2012, 85(1). ISSN 1050-2947. Available under: doi: 10.1103/PhysRevA.85.013623
BibTex
@article{Bruderer2012Mesos-16153,
  year={2012},
  doi={10.1103/PhysRevA.85.013623},
  title={Mesoscopic transport of fermions through an engineered optical lattice connecting two reservoirs},
  number={1},
  volume={85},
  issn={1050-2947},
  journal={Physical Review A},
  author={Bruderer, Martin and Belzig, Wolfgang}
}
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