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arXiv physics/0603069physics.atom-ph
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laser和库仑场中正负电子对产生的极化算符方法

Polarization operator approach to electron-positron pair production in combined laser and Coulomb fields

A. I. Milstein, C. Müller, K. Z. Hatsagortsyan, U. D. Jentschura, C. H. Keitel

摘要:

将光学定理应用于核库仑与强激光场叠加时的正负电子对产生过程。我们推导出新的表示为总生产率的双重积分,无论是圆激光偏振和椭圆偏振的一般情况下,这还没有被处理之前。我们的方法使我们能够通过分析手段获得对创建率的各种限制的利益的渐近行为。特别是,我们认为对生产的双光子吸收,并表明,接近这个过程的能量阈值,率服从幂律的激光频率与不同的指数为线性和圆形的激光偏振。在即将到来的X射线激光源的帮助下,我们的结果可以通过实验进行验证。

英文摘要:

The optical theorem is applied to the process of electron-positron pair creation in the superposition of a nuclear Coulomb and a strong laser field. We derive new representations for the total production rate as two-fold integrals, both for circular laser polarization and for the general case of elliptic polarization, which has not been treated before. Our approach allows us to obtain by analytical means the asymptotic behaviour of the pair creation rate for various limits of interest. In particular, we consider pair production by two-photon absorption and show that, close to the energetic threshold of this process, the rate obeys a power law in the laser frequency with different exponents for linear and circular laser polarization. With the help of the upcoming x-ray laser sources our results could be tested experimentally.

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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