10 citations · 23 across the 3 of their papers we have counts for
4 papers
Unusual light spectra from a two-level atom in squeezed vacuum
G. C. Hegerfeldt, T. I. Sachse, D. G. Sondermann
We investigate the interaction of an atom with a multi-channel squeezed vacuum. It turns out that the light coming out in a particular channel can have anomalous spectral propertie…
Atomic Quantum Zeno Effect for Ensembles and Single Systems
Almut Beige, Gerhard C. Hegerfeldt, Dirk G. Sondermann
The so-called quantum Zeno effect is essentially a consequence of the projection postulate for ideal measurements. To test the effect Itano et al. have performed an experiment on a…
Laser Pulses as Measurements. Application to the Quantum Zeno Effect
Almut Beige, Gerhard C. Hegerfeldt, Dirk G. Sondermann
Short pulses of a probe laser have been used in the past to measure whether a two-level atom is in its ground or excited state. The probe pulse couples the ground state to a third,…
Conditional Hamiltonian and Reset Operator in the Quantum Jump Approach
Gerhard C. Hegerfeldt, Dirk G. Sondermann
For the time development of a single system in the quantum jump approach or for quantum trajectories one requires the conditional (reduced) Hamiltonian between jumps and the reset…