Generalized Toda Mechanics Associated with Classical Lie Algebras and Their Reductions |
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Authors: | ZHAO Liu LIU Wang-Yun YANG Zhan-Ying |
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Institution: | Institute of Modern Physics, Northwest University, Xi'an 710069, China |
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Abstract: | For any classical Lie algebra $\mathfrak{g}$,
we construct a family of
integrable generalizations of Toda mechanics labeled a pair of ordered
integers $(m,n)$. The universal form of the Lax pair, equations of motion,
Hamiltonian as well as Poisson brackets are provided, and explicit examples
for $\mathfrak{g}=B_{r},C_{r},D_{r}$ with $m,n\leq3$ are also given. For all
$m,n$, it is shown that the dynamics of the $(m,n-1)$- and the $(m-1,n)$-Toda
chains are natural reductions of that of the $(m,n)$-chain, and for $m=n$,
there is also a family of symmetrically reduced Toda systems, the
$(m,m)_{\mathrm{Sym}}$-Toda systems, which are also integrable. In the quantum
case, all $(m,n)$-Toda systems with $m>1$ or $n>1$ describe the dynamics of
standard Toda variables coupled to noncommutative variables. Except for the
symmetrically reduced cases, the integrability for all $(m,n)$-Toda systems
survive after quantization. |
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Keywords: | Lax pair Poisson brackets Toda chains |
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