Local quench within the Keldysh technique
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arXiv
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| Main Authors: | , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866916179571900416 |
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| author | Radovskaya, A. A. Semenov, A. G. |
| author_facet | Radovskaya, A. A. Semenov, A. G. |
| contents | 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 analysed. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2403_18137 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Local quench within the Keldysh technique Radovskaya, A. A. Semenov, A. G. High Energy Physics - Phenomenology Statistical Mechanics High Energy Physics - Theory 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 analysed. |
| title | Local quench within the Keldysh technique |
| topic | High Energy Physics - Phenomenology Statistical Mechanics High Energy Physics - Theory |
| url | https://arxiv.org/abs/2403.18137 |