Revisiting semiclassical scalar QED in 1+1 dimensions
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866914528046874624 |
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| author | Sanz-Wuhl, Santiago Zahn, Jochen |
| author_facet | Sanz-Wuhl, Santiago Zahn, Jochen |
| contents | We study the backreaction of a charged scalar quantum field in the presence of two opposite charges placed at the boundaries of a finite one-dimensional region, with attention to boundary effects. We review, correct, and extend previous corresponding work of Ambjørn \& Wolfram \cite{ambjorn_properties_1983}. Despite notable differences, our analysis confirms the mechanism, discussed by Ambjørn \& Wolfram, by which the incorporation of backreaction avoids certain instabilities. We also observe the interesting phenomenon of ``over-screening'', by which for high external charges an increase of the external charges leads to a decrease of the electric field between the two charges. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2605_02570 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Revisiting semiclassical scalar QED in 1+1 dimensions Sanz-Wuhl, Santiago Zahn, Jochen High Energy Physics - Theory General Relativity and Quantum Cosmology We study the backreaction of a charged scalar quantum field in the presence of two opposite charges placed at the boundaries of a finite one-dimensional region, with attention to boundary effects. We review, correct, and extend previous corresponding work of Ambjørn \& Wolfram \cite{ambjorn_properties_1983}. Despite notable differences, our analysis confirms the mechanism, discussed by Ambjørn \& Wolfram, by which the incorporation of backreaction avoids certain instabilities. We also observe the interesting phenomenon of ``over-screening'', by which for high external charges an increase of the external charges leads to a decrease of the electric field between the two charges. |
| title | Revisiting semiclassical scalar QED in 1+1 dimensions |
| topic | High Energy Physics - Theory General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2605.02570 |