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Thermometry of ultracold atoms via non-equilibrium work distributions


Reference:

Johnson, T. H., Cosco, F., Mitchison, M. T., Jaksch, D. and Clark, S. R., 2016. Thermometry of ultracold atoms via non-equilibrium work distributions. Physical Review A: Atomic, Molecular, and Optical Physics, 93 (5).

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    Official URL:

    http://dx.doi.org/10.1103/PhysRevA.93.053619

    Abstract

    Estimating the temperature of a cold quantum system is difficult. Usually, one measures a well-understood thermal state and uses that prior knowledge to infer its temperature. In contrast, we introduce a method of thermometry that assumes minimal knowledge of the state of a system and is potentially non-destructive. Our method uses a universal temperature-dependence of the quench dynamics of an initially thermal system coupled to a qubit probe that follows from the Tasaki-Crooks theorem for non-equilibrium work distributions. We provide examples for a cold-atom system, in which our thermometry protocol may retain accuracy and precision at subnanokelvin temperatures.

    Details

    Item Type Articles
    CreatorsJohnson, T. H., Cosco, F., Mitchison, M. T., Jaksch, D. and Clark, S. R.
    DOI10.1103/PhysRevA.93.053619
    Uncontrolled Keywordsquant-ph,cond-mat.quant-gas,cond-mat.stat-mech
    DepartmentsFaculty of Science > Physics
    Research CentresCondensed Matter Physics CDT
    RefereedYes
    StatusPublished
    ID Code50769
    Additional InformationUpdated to published version. 6 pages plus 11 pages of supplemental material, and some numerical data

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