Abstract
The vacuum is a well-defined notion in a free quantum field theory in unbounded flat space-time, if we use inertial observers; but it is an ill-defined notion if we try to work in a bounded or a curved space-time, or if we use accelerated observers. In these cases infinite new vacuum notion must be defined; and we must deal with unconventional vacua. In this chapter we introduce a reasonable vacuum definition in all the cases where we deal with noninertial observers in curved space-time (bounded space-time will be treated elsewhere).
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Castagnino, M., Ferraro, R. (1988). Toward a Complete Theory for Unconventional Vacua. In: Teitelboim, C. (eds) Quantum Mechanics of Fundamental Systems 1. Series of the Centro de Estudios Científicos de Santiago. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-3728-5_6
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DOI: https://doi.org/10.1007/978-1-4899-3728-5_6
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