Quantum phase transition of light in the Rabi-Hubbard model

M. Schiró, M. Bordyuh, B. Öztop, H. E. Türeci

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


We discuss the physics of the Rabi-Hubbard model describing large arrays of coupled cavities interacting with two level atoms via a Rabi nonlinearity. We show that the inclusion of counter-rotating terms in the light-matter interaction, often neglected in theoretical descriptions based on Jaynes-Cumming models, is crucial to stabilize finite-density quantum phases of correlated photons with no need for an artificially engineered chemical potential. We show that the physical properties of these phases and the quantum phase transition occurring between them is remarkably different from those of interacting bosonic massive quantum particles. The competition between photon delocalization and Rabi nonlinearity drives the system across a novel Z2 parity symmetry-breaking quantum phase transition between two gapped phases, a Rabi insulator and a delocalized super-radiant phase.

Original languageEnglish (US)
Article number224021
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Issue number22
StatePublished - Nov 28 2013

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics


Dive into the research topics of 'Quantum phase transition of light in the Rabi-Hubbard model'. Together they form a unique fingerprint.

Cite this