Classical world arising out of quantum physics under the restriction of coarse-grained measurements

Autor(en)

Johannes Kofler, Caslav Brukner

Abstrakt

Conceptually different from the decoherence program, we present a novel theoretical approach to macroscopic realism and classical physics within quantum theory. It focuses on the limits of observability of quantum effects of macroscopic objects, i.e., on the required precision of our measurement apparatuses such that quantum phenomena can still be observed. First, we demonstrate that for unrestricted measurement accuracy, no classical description is possible for arbitrarily large systems. Then we show for a certain time evolution that under coarse-grained measurements, not only macrorealism but even classical Newtonian laws emerge out of the Schro¿dinger equation and the projection postulate. © 2007 The American Physical Society.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Journal

Physical Review Letters

Band

99

Anzahl der Seiten

4

ISSN

0031-9007

DOI

https://doi.org/10.1103/PhysRevLett.99.180403

Publikationsdatum

2007

Peer-reviewed

Ja

ÖFOS 2012

1030 Physik, Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/2e3184f5-4612-4e15-a1f6-b66d791b9c52