Quadratic Killing tensors on some symmetric spaces of higher rank

An Ky Nguyen; Yuri Nikolayevsky

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arXiv · 2607.25075

Quadratic Killing tensors on some symmetric spaces of higher rank

An Ky Nguyen·Yuri Nikolayevsky

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Abstract

All Killing tensor fields on the spaces of constant curvature and on the complex projective space are decomposable, that is, can be represented as the sum of symmetric tensor products of Killing vector fields (equivalently, every polynomial integral of the geodesic flow is a polynomial in the linear integrals). This is no longer true for quadratic Killing tensor fields on the quaternionic projective spaces $\mathbb{H} P^n, \, n \ge 3$, and on the Cayley projective plane $\mathbb{O} P^2$. We prove that for the real Grassmannians and for the spaces $\mathrm{SL}(n)/\mathrm{SO}(n)$, all quadratic Killing tensor fields are decomposable.

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An Ky Nguyen, Yuri Nikolayevsky. 2026-07-27. Quadratic Killing tensors on some symmetric spaces of higher rank. https://arxiv.org/abs/2607.25075

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