Das Symposium findet am Donnerstag, den 05. Juli 2012 ab 16:00 im Hörsaal D-114 statt.
16:00 Uhr Begrüßung durch den Departmentsprecher Prof. Dr. Ivor Fleck
Dekan der Naturwissenschaftlich-Technischen Fakultät, Prof. Dr.
40 Jahre Physik an der Universität Siegen, Prof. Dr. Siegmund Brandt
Festkolloquium, Prof. Dr. Serge Haroche, Collège de France, Ecole
Normale Supérieure, Paris
Titel: „Juggling with photons in a box to explore the quantum world“
Atoms interacting with microwave photons trapped between highly reflecting superconducting mirrors realize an ideal system to perform some of the thought experiments imagined by the founding fathers of quantum physics and to illustrate fundamental aspects of measurement theory. The experiments performed with this system include the non-destructive counting of photons, the recording of field quantum
jumps, the reconstruction of „Schrödinger cat“ states of radiation and the study of their decoherence which provides a striking illustration of the transition from the quantum to the classical world. Juggling with non-classical photonic states has recently been extended by implementing quantum feedback methods. They fight decoherence by monitoring in real time the field quantum jumps before reversing their effects. The generalization of these studies to systems in which real atoms are replaced by artificial ones will be mentioned.