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Local Quench within the Keldysh Technique
- Authors: Radovskaya A.A.1, Semenov A.G.2
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Affiliations:
- Lebedev Physical Institute, Russian Academy of Sciences
- Skolkovo Institute of Science and Technology
- Issue: Vol 118, No 11-12 (12) (2023)
- Pages: 921-927
- Section: Articles
- URL: https://rjsvd.com/0370-274X/article/view/664213
- DOI: https://doi.org/10.31857/S1234567823240096
- EDN: https://elibrary.ru/NMCNMX
- ID: 664213
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Abstract
The problem of quantum scalar field evolution after an instantaneous local perturbation (quench) is considered. A new approach to descriptions of a quench from an arbitrary initial state is developed in the framework of the Keldysh technique. This approach does not require the procedure of the analytical continuation, which can be ambiguous in some cases. The evolution of the energy density after local quench is calculated for a simple case, and its dependence on the interaction region width and the initial conditions is analyzed.
About the authors
A. A. Radovskaya
Lebedev Physical Institute, Russian Academy of Sciences
Email: raan@lpi.ru
119991, Moscow, Russia
A. G. Semenov
Skolkovo Institute of Science and Technology
Author for correspondence.
Email: raan@lpi.ru
121205, Moscow, Russia
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