Twisted Yangian symmetry of the open Hubbard model
arXiv:1404.2095 · doi:10.1088/1751-8113/47/30/305203
Abstract
We show that, in the open Hubbard model with integrable boundary conditions, the bulk Yangian symmetry is broken to a twisted Yangian. We prove that the associated charges commute with the Hamiltonian and the reflection matrix, and that they form a coideal subalgebra.
arXiv comment13 pages. Minor revisions and additional references
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