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Showing 1–4 of 4 results
Advanced filters: Author: Nicolas Marquez Peraca Clear advanced filters

  • The Dicke model, describing the cooperative coupling of an ensemble of two-level atoms with a single-mode light field, has a rich phenomenology in quantum optics and quantum information, but its analytical or numerical solution is beyond current reach. Here, a solid-state quantum simulator of an extended Dicke model is achieved using ErFeO3 crystals, where terahertz spectroscopy and magnetocaloric effect measurements reveal an atomically ordered phase in addition to the expected superradiant and normal phases.

    • Nicolas Marquez Peraca
    • Xinwei Li
    • Junichiro Kono
    ResearchOpen Access
    Communications Materials
    Volume: 5, P: 1-9

  • Ultrastrong light-matter interactions with dominant antiresonant terms are expected to give rise to interesting phenomena such as quantum fluctuation suppression. Here, the authors propose a system of ultrastrongly coupled magnon modes in a rare earth orthoferrite as a platform for exploring such phenomena.

    • Takuma Makihara
    • Kenji Hayashida
    • Junichiro Kono
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-9

  • Superradiant phase transitions, predicted to occur in the ultra-strong light-matter coupling regime, may offer a route to robust quantum coherence but have not yet been observed at thermal equilibrium. Here, such a transition is predicted in ErFeO3 at about 4 K, revealing unique ground state properties.

    • Motoaki Bamba
    • Xinwei Li
    • Junichiro Kono
    ResearchOpen Access
    Communications Physics
    Volume: 5, P: 1-13