Classical dynamics as observed quantum dynamics

Julián López, Laura Ares, Alfredo Luis

Published 2020-05-01Version 1

We examine a case study where classical evolution emerges when observing a quantum evolution. This a single-mode quantum Kerr evolution interrupted by measurement of the double-homodyne kind projecting the evolved field state into classical-like coherent states or quantum squeezed states. We show that irrespective of whether the measurement is classical or quantum there is no quantum Zeno effect and the evolution turns out to be classical. We provide a practical scheme to perform such measurements.