Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2000-05-20
Int.J.Mod.Phys.A16:97,2001
Physics
High Energy Physics
High Energy Physics - Theory
60 pages, typos corrected
Scientific paper
Recently a construction was given for the stress tensors of all sectors of the general current-algebraic orbifold A(H)/H, where A(H) is any current-algebraic conformal field theory with a finite symmetry group H. Here we extend and further analyze this construction to obtain the mode formulation of each sector of each orbifold A(H)/H, including the twisted current algebra, the Virasoro generators, the orbifold adjoint operation and the commutator of the Virasoro generators with the modes of the twisted currents. As applications, general expressions are obtained for the twisted current-current correlator and ground state conformal weight of each twisted sector of any permutation orbifold A(H)/H, H \subset S_N. Systematics are also outlined for the orbifolds A(Lie h(H))/H of the (H and Lie h)-invariant conformal field theories, which include the general WZW orbifold and the general coset orbifold. Finally, two new large examples are worked out in further detail: the general S_N permutation orbifold A(S_N)/S_N and the general inner-automorphic orbifold A(H(d))/H(d).
Halpern M. B.
Wang John E.
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