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HK: Fachverband Physik der Hadronen und Kerne
HK 54: Instrumentation und Anwendungen
HK 54.1: Vortrag
Donnerstag, 15. März 2007, 17:00–17:15, E
Unruh- and Larmor-Effect in the Ultra High-Field Regime* — •Peter Thirolf1,3, Dietrich Habs1,3, Florian Gruener1,3, Ralf Schuetzhold2, and Gernot Schaller2 — 1LMU München, Department f. Physik, Garching — 2TU Dresden — 3Maier-Leibnitz-Labor, Garching
The ultra high fields of high-power short-pulse lasers and their strong enhancement by a Lorentz-boost for relativistic electrons (γ∼ 103) will - for the first time - grant experimental access to understanding fundamental properties of the quantum vacuum and quantum theory in non-inertial frames. A breakdown of QED occurs at the Schwinger field strength of 1.3·1018V/m, where a virtual e+e− pair of the vacuum gains its rest mass energy over a Compton wavelength and materializes as a real pair. At the Schwinger field strength an electron experiences an acceleration aS=2·1028g, granting experimental access to the long predicted Unruh effect, where an accelerated electron experiences the vacuum as a thermal bath with the Unruh temperature. In its accelerated frame the electron will scatter the virtual photons of the thermal bath, corresponding to the emission of an entangled pair of real photons in the laboratory frame. Possible experimental approaches to measure this effect (the analogon of Hawking’s radiation from a black hole) will be presented, which will also allow to measure the Larmor-effect for linear acceleration for the first time.
*Supported by the Deutsche Forschungsgemeinschaft through the DFG-Cluster of Excellence Munich Centre for Advanced Photonics (MAP)