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Role of qubit-cavity entanglement for switching dynamics of quantum interfaces in superconductor metamaterials

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Abstract

We study quantum effects of strong driving field applied to dissipative hybrid qubit-cavity system which are relevant for a realization of quantum gates in superconducting quantum metamaterials. We demonstrate that effects of strong and non-stationary drivings have significantly quantum nature and cannot be treated by means of mean-field approximation. This is shown from a comparison of steady state solution of the standard Maxwell–Bloch equations and numerical solution of Lindblad equation on a density matrix. We show that mean-field approach provides very good agreement with the density matrix solution at not very strong drivings f < f* but at f > f* a growing value of quantum correlations between fluctuations in qubit and photon sectors changes a behavior of the system. We show that in regime of non-adiabatic switching on of the driving such a quantum correlations influence a dynamics of qubit and photons even at weak f.

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Authors and Affiliations

  1. Dukhov Research Institute of Automatics (VNIIA), Moscow, 127055, Russia

    S. V. Remizov, D. S. Shapiro & A. N. Rubtsov

  2. Kotel’nikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Moscow, 125009, Russia

    S. V. Remizov & D. S. Shapiro

  3. National University of Science and Technology MISIS, 119049, Moscow, Russia

    D. S. Shapiro

  4. Russian Quantum Center, Skolkovo, Moscow region, 143025, Russia

    A. N. Rubtsov

Authors
  1. S. V. Remizov
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  2. D. S. Shapiro
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  3. A. N. Rubtsov
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Correspondence to D. S. Shapiro.

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Remizov, S.V., Shapiro, D.S. & Rubtsov, A.N. Role of qubit-cavity entanglement for switching dynamics of quantum interfaces in superconductor metamaterials. Jetp Lett. 105, 130–136 (2017). https://doi.org/10.1134/S0021364017020060

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  • DOI: https://doi.org/10.1134/S0021364017020060

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