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Constructing Casimirs for the quantum reflection equation
Abstract
We explore the quantum reflection equation in the case of a full-dimensional n× n matrix 𝔸. Using the technique of q-determinants, we find closed expressions for the quantum Pfaffian (in the case of even n) and for new quantum Casimirs that are ratios of special quantum (Sklyanin) minors of 𝔸. Special attention is paid to the self-adjointness property of the newly constructed Casimirs. We put forward a conjecture that, adopting a natural ansatz for a quantum deformation of a Casimir of a classical algebra, self-adjointness implies commutativity. We also explore the relationship to networks of quantum cluster variables.
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BibTeX
@misc{brodsky2026constructing,
title = {{Constructing Casimirs for the quantum reflection equation}},
author = {Erik Brodsky and Leonid O Chekhov and Quanyu Tang},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.08796},
eprint = {2611.08796},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.08796},
}
RIS
TY - UNPB
TI - Constructing Casimirs for the quantum reflection equation
AU - Erik Brodsky
AU - Leonid O Chekhov
AU - Quanyu Tang
PY - 2026
DA - 2026/11/05
PB - arXiv
DO - 10.48550/arxiv.2611.08796
UR - https://arxiv.org/abs/2611.08796
AB - We explore the quantum reflection equation in the case of a full-dimensional n× n matrix 𝔸. Using the technique of q-determinants, we find closed expressions for the quantum Pfaffian (in the case of even n) and for new quantum Casimirs that are ratios of special quantum (Sklyanin) minors of 𝔸. Special attention is paid to the self-adjointness property of the newly constructed Casimirs. We put forward a conjecture that, adopting a natural ansatz for a quantum deformation of a Casimir of a classical algebra, self-adjointness implies commutativity. We also explore the relationship to networks of quantum cluster variables.
ER -