Ursula Keller wins “Swiss Nobel” Marcel Benoist Prize
Farewell: the NCCR MUST ended 
MUST2022 Conference
New scientific highlights
FELs of Europe prize for Jeremy Rouxel
Ruth Signorell wins Doron prize
New FAST-Fellow Uwe Thumm at ETH
International Day of Women and Girls in Science
New scientific highlight
EU XFEL Young Scientist Award for Camila Bacellar,
Prizes for Giulia Mancini and Rebeca Gomez Castillo
Nobel Prize in Chemistry awarded to RESOLV Member Benjamin List
Hans Jakob Wörner invited to give the „New Horizons Solvay Lectures” 
Unusual keynote talk at an international scientific conference
NCCR MUST at Scientifica 2021Hot Topics in Strong-Field Physics
| Date | Di, 06.03.2012 | |
| Time | 11:00 am | |
| Speaker | H. R. Reiss, Max-Born-Institut and American University | |
| Location | ETH Zurich, Hönggerberg, HPF G-6 | |
| Program | A result shown in an earlier lecture; that the well-known and much-used length gauge has a natural extension outside the limits of the dipole approximation, is explored further to examine its logical consequences. It is shown that this extended length gauge is responsible for a variety of false implications that exist in strong-field physics. Most of these errors follow from the seemingly anomalous result that the all-important ponderomotive potential is missing from this extended length-gauge result, despite the fact that it is nominally gauge-equivalent to the usual Coulomb-gauge description of charged particles in plane-wave fields. A second example is given of a physical contrast between two different gauges for the same set of fields. The explanation for these apparent paradoxes is presented, leading to a generalized formulation of strong-field electrodynamics in which an additional constraint is found to be necessary for the presence of gauge equivalence. | |
