Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1993-10-14
J.Phys. A27 (1994) 4669-4684
Physics
High Energy Physics
High Energy Physics - Theory
LATEX, 20 pages, no figures, September 1993
Scientific paper
10.1088/0305-4470/27/13/040
We consider the quantum Lobachevsky space ${\bf L}_q^3$, which is defined as subalgebra of the Hopf algebra ${\cal A}_q(SL_2({\bf C}))$. The Iwasawa decomposition of ${\cal A}_q(SL_2({\bf C}))$ introduced by Podles and Woronowicz allows to consider the quantum analog of the horospheric coordinates on ${\bf L}_q^3$. The action of the Casimir element, which belongs to the dual to ${\cal A}_q$ quantum group $U_q(SL_2({\bf C}))$, on some subspace in ${\bf L}_q^3$ in these coordinates leads to a second order difference operator on the infinite one-dimensional lattice. In the continuos limit $q\rightarrow 1$ it is transformed into the Schr\"{o}dinger Hamiltonian, which describes zero modes into the Liouville field theory (the Liouville quantum mechanics). We calculate the spectrum (Brillouin zones) and the eigenfunctions of this operator. They are $q$-continuos Hermit polynomials, which are particular case of the Macdonald or Rogers-Askey-Ismail polynomials. The scattering in this problem corresponds to the scattering of first two level dressed excitations in the $Z_N$ Baxter model in the very peculiar limit when the anisotropy parameter $\ga$ and $N~\rightarrow\infty$, or, equivalently, $(\ga, N)\rightarrow 0$.
Olshanetsky Mikhail A.
Rogov V.-B. K.
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