Abstract
We investigate electron-positron pair creation in the interaction of a nuclear Coulomb field and a highly intense two-mode laser field. For bichromatic laser fields, we examine the differences arising for commensurable and incommensurable frequencies in a continuous variation of the laser frequency ratio and the quantum interference effects, which may occur in the commensurable case. We show that the interference manifests in the angular distributions and the total pair-production rates of the created particles. Additionally, by varying the amplitudes of the two modes we study pair creation in a monochromatic laser wave of arbitrarily elliptical polarization.
Highlights
The creation of matter from laser light has already been theoretically investigated [1,2,3,4] shortly after the realization of the first laser itself [5]
We investigate electron-positron pair creation in the interaction of a nuclear Coulomb field and a highly intense two-mode laser field
We examine the differences arising for commensurable and incommensurable frequencies in a continuous variation of the laser frequency ratio and the quantum interference effects, which may occur in the commensurable case
Summary
The creation of matter from laser light has already been theoretically investigated [1,2,3,4] shortly after the realization of the first laser itself [5]. On the one hand the various field parameter regimes have been studied by calculating total and differential pair-production rates (e.g., [10,11,12,13,14,15]), while on the other hand more specialized features were examined, such as the effects of the electron spin [16] and the nuclear recoil [17, 18] In all these studies the laser field was assumed to be a monochromatic plane wave with either linear or circular polarization.
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