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Generalized modular values with non-classical pointer states

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Abstract

In this study, we investigate the generalized modular value scheme based on non-classical pointer states. We consider a typical von Neumann measurement with a discrete quantum pointer, where the pointer is a projection operator onto one of the states of the basis of the pointer Hilbert space. We separately calculate the conditional probabilities, Qm factors, and signal-to-noise ratios of quadrature operators of coherent, coherent squeezed, and Schrödinger cat pointer states and find that the non-classical pointer states can increase the negativity of the field and precision of measurement compared with semi-classical states in generalized measurement problems characterized by the modular value.

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Authors and Affiliations

  1. School of Physics and Electronic Engineering, Xinjiang Normal University, Urumqi, Xinjiang, 830054, P.R. China

    Yusuf Turek & Taximaiti Yusufu

  2. Laboratory of Novel Light Source and Micronano-Optics, Xinjiang Normal University, Urumqi, Xinjiang, 830054, P.R. China

    Yusuf Turek & Taximaiti Yusufu

Authors
  1. Yusuf Turek
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  2. Taximaiti Yusufu
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Correspondence to Yusuf Turek.

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Turek, Y., Yusufu, T. Generalized modular values with non-classical pointer states. Eur. Phys. J. D 72, 202 (2018). https://doi.org/10.1140/epjd/e2018-90258-8

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  • DOI: https://doi.org/10.1140/epjd/e2018-90258-8

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