Mathematics – Quantum Algebra
Scientific paper
2002-07-26
Mathematics
Quantum Algebra
26 pages, LaTeX
Scientific paper
10.1063/1.1532106
The aim of this paper is to study the q-Laplace operator and q-harmonic polynomials on the quantum complex vector space generated by z_i,w_i, i=1,2,...,n, on which the quantum group GL_q(n) (or U_q(n)) acts. The q-harmonic polynomials are defined as solutions of the equation Delta_qp=0, where p is a polynomial in z_i,w_i, i=1,2,...,n, and the q-Laplace operator Delta_q is determined in terms of q-derivatives. The q-Laplace operator Delta_q commutes with the action of GL_q(n). The projector H_{m,m'}: A_{m,m'} --> H_{m,m'} is constructed, where A_{m,m'} and H_{m,m'} are the spaces of homogeneous (of degree m in z_i and of degree m' in w_i) polynomials and homogeneous q-harmonic polynomials, respectively. By using these projectors, a q-analogue of the classical zonal spherical and associated spherical harmonics are constructed. They constitute an orthogonal basis of H_{m,m'}. A q-analogue of separation of variables is given. The quantum algebra U_q(gl_n), acting on H_{m,m'}, determines an irreducible representation of U_q(gl_n). This action is explicitly constructed. The results of the paper lead to the dual pair (U_q(sl_2), U_q(gl_n)) of quantum algebras.
Iorgov N. Z.
Klimyk Anatoliy U.
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