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TL;DR: In this article, the Schwinger equations of QED are rewritten in three different ways as integral equations involving functional derivatives, which are called weak field, strong field, and SCF quantum electrodynamics.
Abstract: The Schwinger equations of QED are rewritten in three different ways as integral equations involving functional derivatives, which are called weak field, strong field, and SCF quantum electrodynamics. The perturbative solutions of these equations are given in terms of appropriate Feynman diagrams. The Green function that is used as an electron propagator in each case is discussed in detail. The general renormalization rules for each of the three equations are provided both in a non perturbative way (Dyson relations) and for Feynman diagrams.
6 citations
6 citations
TL;DR: In this paper, the 3D foam geometrical structure is measured by means of optical tomography associated with a reconstruction algorithm, and the conductivity of the real foam is determined by solving the local Laplace equation.
6 citations
29 Sep 2019
TL;DR: In this article, a 1-kHz, 1.5 mJ Cr:ZnSe chirped pulse amplifier with 140 fs pulse width, 9.5 GW peak power at 2.4 µm central wavelength was reported.
Abstract: We report a 1-kHz, 1.5 mJ Cr:ZnSe chirped pulse amplifier with 140 fs pulse width, 9.5 GW peak power at 2.4 µm central wavelength. The amplifier is seeded with a commercial few-cycle Cr:ZnS oscillator.
6 citations
01 Apr 2005
TL;DR: In this article, high power highly efficient AlGa(In)As/GaAs multimode diodes operating at 915 nm range have been developed, achieving 72% peak power conversion efficiency at 25°C heatsink temperature.
Abstract: High power highly-efficient AlGa(In)As/GaAs multimode diodes operating at 915 nm range have been developed. 2 mm long-cavity Chips-On-Submount demonstrate 72% peak power conversion efficiency at 25°C heatsink temperature. Peak power efficiency over 50% was recorded up to 130°C heatsink temperature. CW power launched at 7°C heatsink temperature from 20 um wide aperture devices is around 8.5 W and is thermally limited. This output power level translates into record-high brightness on the facet: > 65 MW/cm2. Device reliability assessment indicates high potential of such devices to operate reliably at high electrical and optical power densities.
6 citations
Authors
Showing all 903 results
| Name | H-index | Papers | Citations |
|---|---|---|---|
| Claude J. Allègre | 106 | 327 | 35092 |
| Paul Tapponnier | 99 | 294 | 42855 |
| Francesco Mauri | 85 | 352 | 69332 |
| Barbara Romanowicz | 67 | 284 | 14950 |
| Geoffrey C. P. King | 64 | 157 | 17177 |
| Yi-Gang Xu | 64 | 271 | 14292 |
| Jérôme Gaillardet | 63 | 199 | 14878 |
| François Guyot | 61 | 292 | 12444 |
| Georges Calas | 60 | 266 | 10901 |
| Ari P. Seitsonen | 59 | 212 | 45684 |
| Michele Lazzeri | 58 | 140 | 57079 |
| Bernard Bourdon | 58 | 118 | 9962 |
| Gianreto Manatschal | 56 | 200 | 10063 |
| Nikolai M. Shapiro | 56 | 154 | 15508 |
| Guillaume Morin | 55 | 156 | 7218 |