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Reconstruction of electromagnetic field states by a probe qubit

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Abstract

We propose a method to measure the quantum state of a single mode of the electromagnetic field. The method is based on the interaction of the field with a probe qubit. The qubit polarizations along coordinate axes are functions of the interaction time and from their Fourier transform we can in general fully reconstruct pure states of the field and obtain partial information in the case of mixed states. The method is illustrated by several examples, including the superposition of Fock states, coherent states, and exotic states generated by the dynamical Casimir effect.

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Authors and Affiliations

  1. Center for Nonlinear and Complex Systems, Dipartimento di Scienza e Alta Tecnologia, Università degli Studi dell’Insubria, via Valleggio 11, 22100, Como, Italy

    Fabrizio Angaroni & Giuliano Benenti

  2. Istituto Nazionale di Fisica Nucleare, Sezione di Milano, via Celoria 16, 20133, Milano, Italy

    Fabrizio Angaroni & Giuliano Benenti

  3. Department of Physics, University of Milan, via Celoria 16, 20133, Milano, Italy

    Giuliano Strini

Authors
  1. Fabrizio Angaroni
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  2. Giuliano Benenti
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  3. Giuliano Strini
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Correspondence to Giuliano Benenti.

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Angaroni, F., Benenti, G. & Strini, G. Reconstruction of electromagnetic field states by a probe qubit. Eur. Phys. J. D 70, 225 (2016). https://doi.org/10.1140/epjd/e2016-70386-y

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  • DOI: https://doi.org/10.1140/epjd/e2016-70386-y

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