Regular Article - Theoretical Physics
Duality in elliptic Ruijsenaars system and elliptic symmetric functions
Lebedev Physics Institute, 119991, Moscow, Russia
2 ITEP, 117218, Moscow, Russia
3 Institute for Information Transmission Problems, 127994, Moscow, Russia
4 MIPT, 141701, Dolgoprudny, Russia
5 SISSA, Trieste, Italy
6 INFN, Sezione di Trieste, IGAP, Trieste, Italy
7 ITMP, Moscow, Russia
Accepted: 16 May 2021
Published online: 26 May 2021
We demonstrate that the symmetric elliptic polynomials originally discovered in the study of generalized Noumi–Shiraishi functions are eigenfunctions of the elliptic Ruijsenaars–Schneider (eRS) Hamiltonians that act on the mother function variable (substitute of the Young-diagram variable ). This means they are eigenfunctions of the dual eRS system. At the same time, their orthogonal complements in the Schur scalar product, are eigenfunctions of the elliptic reduction of the Koroteev–Shakirov (KS) Hamiltonians. This means that these latter are related to the dual eRS Hamiltonians by a somewhat mysterious orthogonality transformation, which is well defined only on the full space of time variables, while the coordinates appear only after the Miwa transform. This observation explains the difficulties with getting the apparently self-dual Hamiltonians from the double elliptic version of the KS Hamiltonians.
© The Author(s) 2021
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