Coupling and decoupling of polaritonic states in multimode cavities

M. Balasubrahmaniyam, Cyriaque Genet, Tal Schwartz

Research output: Contribution to journalArticlepeer-review


We reveal a transition within the strong coupling regime and below the crossover to ultrastrong coupling, which alters the coupling mechanism in multimode cavities. We show that this transition drastically modifies the Hamiltonian describing the polaritons, such that different cavity modes are either entangled via the material or completely decoupled. This decoupling transition occurs due to the competition between the dissipation in the material and the finite group velocity, which governs the propagation of information across the cavity and among the molecules. The results indicate that the velocity of light, which is often not taken into account in cavity quantum electrodynamics, plays a crucial role in the formation of cavity polaritons and their dynamics.

Original languageEnglish
Article numberL241407
JournalPhysical Review B
Issue number24
StatePublished - 15 Jun 2021

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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