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- W4387188518 abstract "Quasielastic scattering processes have long been thought of as providing the most promising signal for a first experimental detection of quantum vacuum nonlinearity. A prominent example of such a process is vacuum birefringence. However, these signals are typically strongly background dominated. This problem can be circumvented by inelastic scattering processes. In this study, we investigate the inelastic process of laser photon merging or equivalently frequency up-shifting in the collision of just two laser pulses under a finite angle, which provides signal photons of a distinct frequency outside the frequency spectrum of the background. To be precise, we consider the merging of three low-energy laser photons into a single outgoing photon in the absence of any additional background field. This can equivalently be framed as a frequency up-shifting process. As a key result, for the example of two laser beams of the same oscillation frequency, we demonstrate that by using high-intensity optical lasers and choosing an optimal collision angle photon merging should become accessible in experiment with state-of-the-art technology. In this case, three frequency $ensuremath{omega}$ laser photons are merged to a single $3ensuremath{omega}$ photon." @default.
- W4387188518 created "2023-09-30" @default.
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- W4387188518 date "2023-09-29" @default.
- W4387188518 modified "2023-10-05" @default.
- W4387188518 title "Two-beam laser photon merging" @default.
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- W4387188518 doi "https://doi.org/10.1103/physrevd.108.056028" @default.
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