A. Álvarez-Domínguez - Vacuum ambiguities in the Schwinger effect and the quantum kinetic approach
Автор: Barrio RQI
Загружено: 2022-09-19
Просмотров: 244
Talk delivered for the Relativistic Quantum Information-North 2022 Online.
Abstract:
The Schwinger effect is a non-perturbative particle creation phenomenon due to the application of a strong electric field. When this external agent is time-dependent, there appear ambiguities when choosing the canonical vacuum of the quantum theory. We analyze how the time evolution of the number of created particles depends on these ambiguities. Moreover, after providing a generalization of the standard quantum Vlasov equation for general vacua, we focus on the family of quantizations that allow for unitary dynamics. As a result, we propose a new criterion to further reduce the family of physically acceptable vacua.
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