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Integrability and duality in spin chains
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DOI：10.1103/PhysRevB.99.075111.png)
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Abstract
En 中文
We construct a two-parametric family of integrable models and reveal their underlying duality symmetry. A modular subgroup of this duality is shown to connect noninteracting modes of different models. We apply this solution and duality to a Richardson-Gaudin model and generate a novel integrable system termed the s-d wave Richardson-Gaudin-Kitaev interacting chain, interpolating sand d-wave superconductivity. The phase diagram of this interacting model has a topological phase transition that can be connected to the duality, where the occupancy of the noninteracting mode serves as a topological order parameter.
Keywords:
INTERACTING BOSE-GAS
OPTICAL-FIBERS
QUANTUM-THEORY
BODY PROBLEM
MODEL
SOLITONS
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