Calogero-Sutherland system with two types interacting spins
S. Kharchev+#, A. Levin* + 1), M. Olshanetsky+# 1), A. Zotov× + 1)
+Institute of Theoretical and Experimental Physics, 117218 Moscow, Russia
*International Laboratory for Mirror Symmetry and Automorphic Forms,
Mathematics Department of NRU HSE, 119048 Moscow, Russia
×Steklov Mathematical Institute RAS, 119991 Moscow, Russia
#Institute for Information Transmission Problems RAS (Kharkevich Institute), 127994 Moscow, Russia
Abstract
We consider the classical Calogero-Sutherland system with two
types
of interacting spin variables. It can be reduced to the standard
Calogero-Sutherland system, when one of the spin variables vanishes.
We describe the model in the Hitchin approach and
prove complete integrability of the system by constructing the Lax
pair and the classical r-matrix with the spectral parameter on a
singular curve.