18 citations · 30 across the 3 of their papers we have counts for
6 papers · 1 filter
Quantum optical time-of-arrival model in three dimensions
V. Hannstein, G. C. Hegerfeldt, J. G. Muga
We investigate the three-dimensional formulation of a recently proposed operational arrival-time model. It is shown that within typical conditions for optical transitions the resul…
Cooperative quantum jumps for three dipole-interacting atoms
Volker Hannstein, Gerhard C. Hegerfeldt
We investigate the effect of the dipole-dipole interaction on the quantum jump statistics of three atoms. This is done for three-level systems in a V configuration and in what may…
Cooperative fluorescence effects for dipole-dipole interacting systems with experimentally relevant level configurations
Volker Hannstein, Gerhard C. Hegerfeldt
The mutual dipole-dipole interaction of atoms in a trap can affect their fluorescence. Extremely large effects were reported for double jumps between different intensity periods in…
Particle localization and the Notion of Einstein Causality
Gerhard C. Hegerfeldt
The notion of Einstein causality, i.e. the limiting role of the velocity of light in the transmission of signals, is discussed. It is pointed out that Nimtz and coworkers use the n…
Theoretical challenges in atom optics: Atomic and molecular diffraction by transmission gratings
Gerhard C. Hegerfeldt, Thorsten Koehler
A few years ago, diffraction of atoms by double slits and gratings was achieved for the first time, and standard optical wave-theory provided an excellent description of the experi…
Problems about Causality in Fermi's Two-Atom Model and Possible Resolutions
Gerhard C. Hegerfeldt
In order to check finite propagation speed Fermi, in 1932, had considered two atoms A and B separated by some distance R. At time t=0, A is in an excited state, B in its ground sta…