Journal
APPLIED PHYSICS B-LASERS AND OPTICS
Volume 104, Issue 4, Pages 769-782Publisher
SPRINGER
DOI: 10.1007/s00340-011-4568-2
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Funding
- DFG Cluster of Excellence MAP (Munich-Center for Advanced Photonics)
- MEXT of Japan [21654035]
- Grants-in-Aid for Scientific Research [21654035] Funding Source: KAKEN
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In vacuum high-intensity lasers can cause photon-photon interaction via the process of virtual vacuum polarization which may be measured by the phase velocity shift of photons across intense fields. In the optical frequency domain, the photon-photon interaction is polarization-mediated described by the Euler-Heisenberg effective action. This theory predicts the vacuum birefringence or polarization dependence of the phase velocity shift arising from nonlinear properties in quantum electrodynamics (QED). We suggest a method to measure the vacuum birefringence under intense optical laser fields based on the absolute phase velocity shift by phase-contrast Fourier imaging. The method may serve for observing effects even beyond the QED vacuum polarization.
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