Exactly Solvable Phase Transition in a Cavity-Coupled 1D Ising Chain
arXiv:2507.01486 · doi:10.1103/fxml-nv46
Abstract
Although one-dimensional classical spin chains do not exhibit phase transitions, we found that a phase transition does occur when they are coupled to a cavity photon mode. This provides the simplest exactly solvable examples demonstrating that finite-temperature superradiant phase transitions can emerge from long-range fully connected interactions mediated by photons and interactions within the material.
Published version, 10 pages, 3 figures
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