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Quasi-superradiant soliton state of matter in quantum metamaterials

Author

Listed:
  • Hidehiro Asai

    (Nanoelectronics Research Institute (NeRI), National Institute of Advanced Industrial Science and Technology (AIST)
    Loughborough University)

  • Shiro Kawabata

    (Nanoelectronics Research Institute (NeRI), National Institute of Advanced Industrial Science and Technology (AIST))

  • Sergey E. Savel’ev

    (Loughborough University)

  • Alexandre M. Zagoskin

    (Loughborough University
    Theoretical Physics and Quantum Technologies Department, Moscow Institute for Steel and Alloys)

Abstract

Strong interaction of a system of quantum emitters (e.g., two-level atoms) with electromagnetic field induces specific correlations in the system accompanied by a drastic increase of emitted radiation (superradiation or superfluorescence). Despite the fact that since its prediction this phenomenon was subject to a vigorous experimental and theoretical research, there remain open question, in particular, concerning the possibility of a first order phase transition to the superradiant state from the vacuum state. In systems of natural and charge-based artificial atom this transition is prohibited by “no-go” theorems. Here we demonstrate numerically and confirm analytically a similar transition in a one-dimensional quantum metamaterial – a chain of artificial atoms (qubits) strongly interacting with classical electromagnetic fields in a transmission line. The system switches from vacuum state to the quasi-superradiant (QS) phase with one or several magnetic solitons and finite average occupation of qubit excited states along the transmission line. A quantum metamaterial in the QS phase circumvents the “no-go” restrictions by considerably decreasing its total energy relative to the vacuum state by exciting nonlinear electromagnetic solitons.

Suggested Citation

  • Hidehiro Asai & Shiro Kawabata & Sergey E. Savel’ev & Alexandre M. Zagoskin, 2018. "Quasi-superradiant soliton state of matter in quantum metamaterials," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 91(2), pages 1-6, February.
    • Handle: RePEc:spr:eurphb:v:91:y:2018:i:2:d:10.1140_epjb_e2017-80567-7
    DOI: 10.1140/epjb/e2017-80567-7
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    Keywords

    Mesoscopic and Nanoscale Systems;

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