Nonequilibrium delocalization-localization transition of photons in circuit quantum electrodynamics

S. Schmidt, D. Gerace, A. A. Houck, G. Blatter, H. E. Türeci

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89 Scopus citations


We show that photons in two tunnel-coupled microwave resonators each containing a single superconducting qubit undergo a sharp nonequilibrium delocalization-localization (self-trapping) transition due to strong photon-qubit coupling. We find that self-trapping of photons in one of the resonators (spatial localization) forces the qubit in the opposite resonator to remain in its initial state (energetic localization). This allows for an easy experimental observation of the transition by local readout of the qubit state. Dissipation of photons and decoherence of the qubit favor the self-trapped regime.

Original languageEnglish (US)
Article number100507
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number10
StatePublished - Sep 29 2010

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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