Ferromagnetic Heisenberg spin chain in a resonator

We investigate the properties of a generalized Rabi model by replacing the two-level atom in Rabi model with a ferromagnetic Heisenberg spin chain. We find that the dynamical behavior of the system can be divided into four categories. The energy spectrum of the ground state and some low excited stat...

Full description

Saved in:
Bibliographic Details
Published in:Chinese physics B 2021-09, Vol.30 (9), p.90506-209
Main Authors: Cao, Yusong, Cao, Junpeng, Fan, Heng
Format: Article
Language:English
Subjects:
magnon
quantum phase transition
resonator
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We investigate the properties of a generalized Rabi model by replacing the two-level atom in Rabi model with a ferromagnetic Heisenberg spin chain. We find that the dynamical behavior of the system can be divided into four categories. The energy spectrum of the ground state and some low excited states are obtained. When the magnons and the photon are in resonance, the model is exactly solvable and the rigorous solution is obtained. Near the resonance point where the detuning is small, the system is studied with the help of perturbation theory. This model has a spontaneously breaking of parity symmetry, suggesting the existence of a quantum phase transition. The critical exponent from the normal phase is computed.
ISSN:1674-1056
DOI:10.1088/1674-1056/ac1334