RT Journal Article
T1 Quantum unitary dynamics of a charged fermionic field and Schwinger effect
A1 Álvarez Domínguez, Álvaro
A1 Garay Elizondo, Luis Javier
A1 García Heredia, David
A1 Martín Benito, Mercedes
AB In quantum field theory, particle creation occurs, in general, when an intense external field, such as an electromagnetic field, breaks time translational invariance. This leads to an ambiguity in the definition of the vacuum state. In cosmological backgrounds this ambiguity has been reduced by imposing that the quantization preserves the symmetries of the system and that the dynamics is unitarily implemented. In this work, we apply these requirements to the quantization of a massive charged fermionic field coupled to a classical time-dependent homogeneous electric field, extending previous studies done for a scalar field. We characterize the quantizations fulfilling the criteria above and we show that they form a unique equivalence class of unitarily related quantizations, which provide a well-defined number of created particles at all finite times.
PB Springer
SN 1029-8479
YR 2021
FD 2021-10-08
LK https://hdl.handle.net/20.500.14352/4986
UL https://hdl.handle.net/20.500.14352/4986
LA eng
NO Ministerio de Ciencia e Innovación (MICINN)
NO IPARCOS
DS Docta Complutense
RD 17 abr 2025