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Quantum meaning of classical field theory

✍ Scribed by r jackiw

Publisher: american physical society
Year: 1977
Tongue: English
Leaves: 26
Series: classic publication
Category: Library

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✦ Synopsis

Recent researches have shown that it is possible to obtain information about the physical content of nontrivial quantum field theories by semiclassical methods. This article reviews some of these investigations. We discuss how solutions to field equations, treated as classical, c-number nonlinear differential equations, expose unexpected states in the quantal Hilbert space with novel quantum numbers which arise from topological properties of the classical field' configuration or from the mixing of internal and space-time symmetries. Also imaginary-time, c -number solutions are reviewed. It is shown that they provide nonperturbative information about the vacuum sector of the quantum theory.

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