期刊
PHYSICS LETTERS B
卷 536, 期 1-2, 页码 169-176出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0370-2693(02)01805-1
关键词
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When a quantum field theory possesses topological excitations in a phase with spontaneously broken symmetry, these are created by operators which are non-local with respect to the order parameter. Due to non-locatity, such disorder operators have non-trivial correlation functions even in free massive theories. In two dimensions, these correlators can be expressed exactly in terms of solutions of non-linear differential equations. The correlation functions of the one-parameter family of non-local operators in the free charged bosonic and fermionic models are the inverse of each other. We point out a simple derivation of this correspondence within the form factor approach. (C) 2002 Elsevier Science B.V. All rights reserved.
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