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Decoherence and Quantum Couplings in a Noisy Environment

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Quantum Annealing and Other Optimization Methods

Part of the book series: Lecture Notes in Physics ((LNP,volume 679))

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Abstract

In this chapter, I will review the established theory of quantum systems coupled to noisy condensed-phase environments, emphasising the central role played by the spectral functions of the environmental fluctuations. I will show how the application of the fluctuation-dissipation theorem to these functions leads to important connections between the coherent couplings and incoherent dynamics induced by the environment, and hence gives in-principle limits on the entangling power of quantum gates. I will give examples of this connection from condensed-matter and quantum-optical systems.

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Authors and Affiliations

  1. Department of Physics and Astronomy, University College London, Gower St, London, WC1E 6BT

    Andrew Fisher

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  1. Andrew Fisher
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Arnab Das Bikas K. Chakrabarti

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Fisher, A. Decoherence and Quantum Couplings in a Noisy Environment. In: Das, A., K. Chakrabarti, B. (eds) Quantum Annealing and Other Optimization Methods. Lecture Notes in Physics, vol 679. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11526216_5

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  • DOI: https://doi.org/10.1007/11526216_5

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-27987-7

  • Online ISBN: 978-3-540-31515-5

  • eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)

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