Simplex sigillum veri: Single atoms may settle quantum queries (Prof. P. Toschek)
Nov 10, 2015
14:30 - 16:00
Prof. Dr. Peter E. Toschek, Institut für Laser-Physik, Universität Hamburg
Herbert Walther Lecture Hall
Modern atomism evolved on the basis of observations of matter’s macroscopic features.
Early in the twentieth century, cloud chamber traces and scintillograms
merely offered transitory post-mortem images of quantum objects that
lacked reproducibility. More recently, individual atomic ions have been
prepared for extended and repeated observation and manipulation.
Moreover, quantum measurements on individual objects are unique: They
result in eigenvalues, not in expectation values, classical quantities
that appear as the outcome from measured ensembles. Consequently, those
quantum measurements offer more than just recordings of unprecedented
precision. They even allow insights — sometimes unexpected or
counter-intuitive ones — in the very nature of quantum interactions and
in the peculiarities of quantum measurement. This potential is laid open
in characteristic examples.