Vacuum polarization and pair production in time-dependent electric fields: A quantum-kinetic-equation approach
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866917239080353792 |
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| author | Aleksandrov, I. A. Bokhan, V. A. Baksheev, A. I. Kudlis, A. |
| author_facet | Aleksandrov, I. A. Bokhan, V. A. Baksheev, A. I. Kudlis, A. |
| contents | The evolution of the vacuum state in a time-dependent external electric field of arbitrary polarization is investigated within a nonperturbative framework of quantum kinetic equations (QKEs). In our previous work [Phys. Rev. Res. 6, 043009 (2024)], a revised version of the QKEs was derived by using an adiabatic basis constructed from one-particle Hamiltonian eigenfunctions in a spatially homogeneous electric field. In this study, we present an extensive analysis of these equations with particular emphasis on observable quantities. Specifically, we compute momentum-resolved particle yields, the induced electron-positron current, the energy-momentum tensor, and the angular-momentum tensor. We also discuss in detail the charge-renormalization procedure required to remove logarithmic divergences. It is shown that our results are consistent with the previous findings obtained via the Dirac-Heisenberg-Wigner formalism. Our analysis provides a firmer theoretical basis for investigations of nonperturbative effects in strong electric fields. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_00873 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Vacuum polarization and pair production in time-dependent electric fields: A quantum-kinetic-equation approach Aleksandrov, I. A. Bokhan, V. A. Baksheev, A. I. Kudlis, A. High Energy Physics - Phenomenology The evolution of the vacuum state in a time-dependent external electric field of arbitrary polarization is investigated within a nonperturbative framework of quantum kinetic equations (QKEs). In our previous work [Phys. Rev. Res. 6, 043009 (2024)], a revised version of the QKEs was derived by using an adiabatic basis constructed from one-particle Hamiltonian eigenfunctions in a spatially homogeneous electric field. In this study, we present an extensive analysis of these equations with particular emphasis on observable quantities. Specifically, we compute momentum-resolved particle yields, the induced electron-positron current, the energy-momentum tensor, and the angular-momentum tensor. We also discuss in detail the charge-renormalization procedure required to remove logarithmic divergences. It is shown that our results are consistent with the previous findings obtained via the Dirac-Heisenberg-Wigner formalism. Our analysis provides a firmer theoretical basis for investigations of nonperturbative effects in strong electric fields. |
| title | Vacuum polarization and pair production in time-dependent electric fields: A quantum-kinetic-equation approach |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2602.00873 |