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We study the properties of wave-packet states with vortex structure. In particular we present the characteristics of a two-mode radiation field characterized by a configuration-space wave function [Formula Presented] We show the generation of such states by the interaction of systems with squeezed radiation in a two-mode cavity. The two modes are correlated due to entanglement, which also produces the mixed state of each mode even though the state of the two-mode field is a pure state. 1997 The American Physical Society.
author list (cited authors)
Agarwal, G. S., Puri, R. R., & Singh, R. P.