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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2023, Volume 118, Issue 12, Pages 921–927
DOI: https://doi.org/10.31857/S1234567823240096 (Mi jetpl7115) 		 
METHODS OF THEORETICAL PHYSICS

Local quench within the Keldysh technique

A. A. Radovskayaa, A. G. Semenovab

a Lebedev Physical Institute, Russian Academy of Sciences, Moscow, 119991 Russia
b Skolkovo Institute of Science and Technology, Moscow, 121205 Russia
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DOI: https://doi.org/10.31857/S1234567823240096
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.
Received: 10.10.2023
Revised: 03.11.2023
Accepted: 14.11.2023
English version:
Journal of Experimental and Theoretical Physics Letters, 2023, Volume 118, Issue 12, Pages 922–928
DOI: https://doi.org/10.1134/S0021364023603639
Bibliographic databases:
Document Type: Article
Language: Russian
Citation: A. A. Radovskaya, A. G. Semenov, “Local quench within the Keldysh technique”, Pis'ma v Zh. Èksper. Teoret. Fiz., 118:12 (2023), 921–927; JETP Letters, 118:12 (2023), 922–928
Citation in format AMSBIB
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\by A.~A.~Radovskaya, A.~G.~Semenov
\paper Local quench within the Keldysh technique
\jour Pis'ma v Zh. \`Eksper. Teoret. Fiz.
\yr 2023
\vol 118
\issue 12
\pages 921--927
\mathnet{http://mi.mathnet.ru/jetpl7115}
\crossref{https://doi.org/10.31857/S1234567823240096}
\edn{https://elibrary.ru/nmcnmx}
\transl
\jour JETP Letters
\yr 2023
\vol 118
\issue 12
\pages 922--928
\crossref{https://doi.org/10.1134/S0021364023603639}
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