dorsal/arxiv
View SchemaPulsations of the electron-positron plasma in the field of optical lasers
| Authors | D. B. Blaschke, A. V. Prozorkevich, S. A. Smolyansky, A. V. Tarakanov |
|---|---|
| Categories | |
| ArXiv ID | physics/0410114 |
| URL | https://arxiv.org/abs/physics/0410114 |
Abstract
The possibility to observe vacuum electron-positron pair creation due to a powerful optical laser pulse is discussed. We employ a quantum kinetic formulation of the problem with a source term describing the vacuum pair production in a homogeneous electric field with arbitrary time dependence (dynamical Schwinger mechanism). For a periodic field weak in comparison with the critical value E_{cr}=m^2/|e|, the electron-positron plasma density changes approximately periodically with twice the field frequency. Under these conditions, the mean value $<n>$ for the density per period in the volume lambda^3 is a more appropriate characteristic quantity than the residual density n_r which is taken over an integer number of field periods and calculated using the imaginary time method. The value <n> is proportional to the squared field intensity and does not depend on the frequency. We show that in terms of the parameter <n> an optical laser can be more effective than a X-ray one. We expect that it is possible to observe the vacuum creation effect not only by means of the planned X-ray free electron lasers but already at present-day optical lasers.
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"abstract": "The possibility to observe vacuum electron-positron pair creation due to a\npowerful optical laser pulse is discussed. We employ a quantum kinetic\nformulation of the problem with a source term describing the vacuum pair\nproduction in a homogeneous electric field with arbitrary time dependence\n(dynamical Schwinger mechanism). For a periodic field weak in comparison with\nthe critical value E_{cr}=m^2/|e|, the electron-positron plasma density changes\napproximately periodically with twice the field frequency. Under these\nconditions, the mean value $\u003cn\u003e$ for the density per period in the volume\nlambda^3 is a more appropriate characteristic quantity than the residual\ndensity n_r which is taken over an integer number of field periods and\ncalculated using the imaginary time method. The value \u003cn\u003e is proportional to\nthe squared field intensity and does not depend on the frequency. We show that\nin terms of the parameter \u003cn\u003e an optical laser can be more effective than a\nX-ray one. We expect that it is possible to observe the vacuum creation effect\nnot only by means of the planned X-ray free electron lasers but already at\npresent-day optical lasers.",
"arxiv_id": "physics/0410114",
"authors": [
"D. B. Blaschke",
"A. V. Prozorkevich",
"S. A. Smolyansky",
"A. V. Tarakanov"
],
"categories": [
"physics.plasm-ph",
"hep-ph",
"physics.acc-ph",
"quant-ph"
],
"title": "Pulsations of the electron-positron plasma in the field of optical lasers",
"url": "https://arxiv.org/abs/physics/0410114"
},
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