{"title":"Locally Constant and Crossed-Field Approximation for Description of the Photon Emission in a Strong Oscillating Electric Field","authors":"A. A. Mironov, E. G. Gel’fer, A. M. Fedotov","doi":"10.3103/S1068335623170098","DOIUrl":null,"url":null,"abstract":"<p>The process of photon emission by a charged scalar particle (spinless analog of an electron) in a strong spatially homogeneous time-dependent electric field is considered. In the case where the emitting particle is ultrarelativistic and the field strength component oriented perpendicular to the particle motion direction is sufficiently large, the emission probability amplitude can be generally calculated within the locally constant field approximation (LCFA). By an example of a linearly polarized oscillating electric field, the applicability limits of this approximation are analyzed, and its predictions are compared with the results of numerical calculation of the process amplitude using the semiclassical solution of the Klein–Gordon equation in a time-dependent field.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"50 5","pages":"S587 - S593"},"PeriodicalIF":0.6000,"publicationDate":"2023-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bulletin of the Lebedev Physics Institute","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.3103/S1068335623170098","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
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Abstract
The process of photon emission by a charged scalar particle (spinless analog of an electron) in a strong spatially homogeneous time-dependent electric field is considered. In the case where the emitting particle is ultrarelativistic and the field strength component oriented perpendicular to the particle motion direction is sufficiently large, the emission probability amplitude can be generally calculated within the locally constant field approximation (LCFA). By an example of a linearly polarized oscillating electric field, the applicability limits of this approximation are analyzed, and its predictions are compared with the results of numerical calculation of the process amplitude using the semiclassical solution of the Klein–Gordon equation in a time-dependent field.
期刊介绍：
Bulletin of the Lebedev Physics Institute is an international peer reviewed journal that publishes results of new original experimental and theoretical studies on all topics of physics: theoretical physics; atomic and molecular physics; nuclear physics; optics; lasers; condensed matter; physics of solids; biophysics, and others.
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