Phase transition to superradiance in a multicomponent system

Georgin Moiseevich Zaslavskiî, Yu. A. Kudenko, A. P. Slivinskiǐ

A. Crubellier, Catherine Bréchignac, Ph. Cahuzac +1 more

D. D. Sedov, Valerii K. Kozin, Ivan V. Iorsh

We present a direct mapping between the quantum optomechanical problem of the atoms harmonically trapped in the vicinity of a chiral waveguide and a generalized quantum Rabi model, and we discuss the analogy between the self-organization of atomic chains in photonic structures and Dicke-like quantum phase transitions in the ultrastrong coupling regime. We extend the class of the superradiant phase transitions for the systems possessing Z_{3} rather than parity Z_{2} symmetry and demonstrate the emergence of the multicomponent Schrödinger-cat ground states in these systems.

B. M. Pimentel, Abraham Hirsz Zimerman

Igor K. Kudryavtsev, A N Meleshko, A. S. Shumovskiǐ

A study is made of a phase transition in a multicomponent system of two-level atoms interacting with a finite set of electromagnetic field modes. It is shown that the coupling between the components increases the temperature of a phase transition to a state characterized by ordering in the atomic subsystem and simultaneous filling of the photon modes.

Sivasubramanian Somu