Brijesh Kumar, Somenath Jalal
The atomic dipoles in the Rabi lattice model exhibit quantum Ising dynamics which is exact in the limit of strong atom-photon interaction. It governs the para- to ferro-electric phase transition in the ground state. As a result of the strong coupling quantum Ising dynamics, the Rabi lattice model on an open chain also realizes two Majorana fermions localized at the boundary ends. In one-dimension, the DMRG calculations of the quantum phase diagram and atomic polarization clearly support the strong coupling behavior, and also yield the correct end-to-end dipole correlation which is a definite signature of these Majorana fermions.
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http://arxiv.org/abs/1210.6922
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