Zero Mode Problem of Liouville Field Theory
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We quantise canonical free-field zero modes $p$, $q$ on a half-plane $p>0$ both, for the Liouville field theory and its reduced Liouville particle dynamics. We describe the particle dynamics in detail, calculate one-point functions of particle vertex operators, deduce their zero mode realisation on the half-plane, and prove that the particle vertex operators act self-adjointly on a Hilbert space $L^2(\rr_+)$ on account of symmetries generated by the $S$-matrix. Similarly, self-adjointness of the corresponding vertex operator of Liouville field theory in the zero mode sector is obtained by applying the Liouville reflection amplitude, which is derived by the operator method.
25 pages, latex, 4 figures, chap. 3.2 extended, chap. 3.3 new, former chap. 3.3 as App. E
25 pages, latex, 4 figures, chap. 3.2 extended, chap. 3.3 new, former chap. 3.3 as App. E