TY - GEN
AB - We present a novel theoretical approach to macroscopic realism and classical physics within quantum theory and which is conceptually different from the decoherence program. It puts the stress on the limits of observability of quantum effects of macroscopic objects, i.e., on the required precision of our measurement apparatuses such that quantum effects can still be observed. First, we demonstrate that for unrestricted measurement accuracy a violation of macrorealism is possible for arbitrary large systems. Then we show that, given the restriction of coarse-grained measurement resolution, not only macrorealism becomes valid but even the classical (Newtonian) laws emerge out of a quantum (Schroedinger) time evolution and the projection postulate. Classical physics can thus be seen as implied by quantum mechanics under the restriction of fuzzy measurements.
AU - Kofler, J.
AU - Brukner, Č.
DA - 2006/09/11/
PY - 2006
SE - 2006/09/11/
TI - Classical world because of quantum physics
UR - http://arxiv.org/abs/quant-ph/0609079
ER -