Explicit isomorphisms for the symmetry algebras of continuous and discrete isotropic oscillators

2025/05/21 by Pavel Drozdov, Giorgio Gubbiotti, Drozdov, Pavel +3 · 1 citation
Engineering · Physics and Astronomy · #FOS: Physical sciences #Geophysics and Sensor Technology #Mathematical Physics (math-ph) #Photonic and Optical Devices #Quantum optics and atomic interactions

paper · doi:10.48550/arxiv.2505.15672

openalex publication_date 2025/05/21 · openalex created_date 2025/10/19 · openalex updated_date 2026/07/28

Abstract

We present a detailed study of a parametric Lie algebra encompassing the symmetry algebras of various models, both continuous and discrete. This algebraic structure characterizes the isotropic oscillator (with positive, purely imaginary, and zero frequency) and one of its possible nonlinear deformations. We demonstrate a novel occurrence of this Lie algebra in the framework of maximally superintegrable discretizations of the isotropic harmonic oscillator. In particular, we also show that the continuous model and one of its discretizations admit a Nambu-Hamiltonian structure. Through an in-depth analysis of the properties characterizing the Lie algebra in the abstract setting, for different values of the parameter, we find explicit expressions of the Killing forms and construct explicit isomorphism maps to \mathfraku_N, \mathfrakgl_N(ℝ), and a semidirect sum of \mathfrakso_N(ℝ) with ℝ^N(N+1)/2. Notably, due to the above isomorphisms, our formulas hold true for \mathfraksu_N and \mathfraksl_N(ℝ) and are valid for arbitrary N.

Cited by

• A novel chain of Lie algebras and its coalgebra symmetry

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