Physics – Mathematical Physics
Scientific paper
2009-11-23
J. Phys. A: Math. Theor. 43 (2010) 082001 (10pp)
Physics
Mathematical Physics
14 pages, no figure; change of title + important addition to sect. 4 + 2 more references + minor modifications; accepted by JP
Scientific paper
In a recent FTC by Tremblay {\sl et al} (2009 {\sl J. Phys. A: Math. Theor.} {\bf 42} 205206), it has been conjectured that for any integer value of $k$, some novel exactly solvable and integrable quantum Hamiltonian $H_k$ on a plane is superintegrable and that the additional integral of motion is a $2k$th-order differential operator $Y_{2k}$. Here we demonstrate the conjecture for the infinite family of Hamiltonians $H_k$ with odd $k \ge 3$, whose first member corresponds to the three-body Calogero-Marchioro-Wolfes model after elimination of the centre-of-mass motion. Our approach is based on the construction of some $D_{2k}$-extended and invariant Hamiltonian $\chh_k$, which can be interpreted as a modified boson oscillator Hamiltonian. The latter is then shown to possess a $D_{2k}$-invariant integral of motion $\cyy_{2k}$, from which $Y_{2k}$ can be obtained by projection in the $D_{2k}$ identity representation space.
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