2026-06-27T15:35:19Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/49862023-08-26T00:53:30Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense
author
Álvarez Domínguez, Álvaro
author
Garay Elizondo, Luis Javier
author
García Heredia, David
author
Martín Benito, Mercedes
2023-06-16T14:25:12Z
2023-06-16T14:25:12Z
2021-10-08
1029-8479
10.1007/JHEP10(2021)074
https://hdl.handle.net/20.500.14352/4986
https://doi.org/10.1007/JHEP10%282021%29074
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.
eng
Atribución 3.0 España
Quantum unitary dynamics of a charged fermionic field and Schwinger effect
journal article
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JHEP10(2021)074.pdf
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JHEP10(2021)074.pdf.txt