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arXiv 1302.0860quant-phphysics.optics
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隧道限制与laser字段不兼容

Incompatibility of the tunneling limit with laser fields

H. R. Reiss

摘要:

施温格极限是指纵向电场足够强,通过隧道机制将真空“压缩”成电子-正电子对。激光场是横向电磁场,与Schwinger极限无关。由于表征场的F^{μν} F_{μν}洛伦兹不变量的不同值,纵向场和横向场是根本不同的。这种差异的一个方面是零频率限制,存在于纵向场,但不明确的横向场。因此,用足够强的激光接近施温格极限的目标是不可能的。超导转变速率的特征在于指数行为的形式exp(-C/E),其中E是所施加的电场的大小和C是系统相关的常数。这种行为的库仑计内的激光诱导过程的治疗的解释是失败的。

英文摘要:

The Schwinger limit refers to longitudinal electric fields that are sufficiently strong to "polarize the vacuum" into electron-positron pairs by a tunneling mechanism. Laser fields are transverse electromagnetic fields for which the Schwinger limit has no relevance. Longitudinal and transverse fields are fundamentally different because of the different values of the F^{μν}F_{μν} Lorentz invariant that characterizes the fields. One aspect of this difference is the zero-frequency limit, that exists for longitudinal fields, but is ill-defined for transverse fields. The goal of approaching the Schwinger limit with sufficiently strong lasers is thus not a possibility. Tunneling transition rates are characterized by an exponential behavior of the form exp(-C/E), where E is the magnitude of the applied electric field and C is a system-dependent constant. Searches for such behavior within a Coulomb-gauge treatment of laser-induced processes are shown to fail.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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