Quantum Ising dynamics and Majorana-like edge modes in the Rabi lattice model
arXiv:1210.6922 · doi:10.1103/PhysRevA.88.011802
Abstract
The atomic dipoles in the Rabi lattice model exhibit quantum Ising dynamics in the limit of strong atom-photon interaction. It governs the para- to ferro-electric phase transition in the ground state. On an open chain, it implies the existence of two Majorana-like, albeit topologically unprotected, edge modes in the ordered phase. The relation ρ^x_{1L}=p^8 between the end-to-end dipole correlation, ρ^x_{1L}, and the spontaneous polarization, p, is proposed as an observable signature of these edge modes. The DMRG calculations on the one-dimensional Rabi lattice support the strong coupling quantum Ising behavior, and correctly yield the proposed end-to-end dipole correlation. The conditions which protect the edge modes against the adverse perturbations are also identified.
5 pages, 4 figures
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- Quantum Monte Carlo Study of the Rabi-Hubbard Model
- Robust Preparation of Many-body Ground States in Jaynes-Cummings Lattices
- Edge modes in a frustrated quantum Ising chain
- Superfluid-Mott-insulator phase transition of light in a two-mode cavity array with ultrastrong coupling
- Phase diagram of a QED-cavity array coupled via a N-type level scheme