Équipe de Recherche en Physique de l'Information Quantique


Abstract = {We study the emergence of objective properties in open quantum
systems. In our analysis, the environment is promoted from a passive
role of reservoir selectively destroying quantum coherence, to an
active role of amplifier selectively proliferating information about
the system. We show that only preferred pointer states of the
system can leave a redundant and therefore easily detectable imprint on
the environment. Observers who---as it is almost always the
case---discover the state of the system indirectly (by probing a
fraction of its environment) will find out only about the
corresponding pointer observable. Many observers can act in this
fashion independently and without perturbing the system: they will
agree about the state of the system. In this operational sense, em
preferred pointer states exist objectively.},
Author = {Ollivier, H. and Poulin, D. and Zurek, W. H.},
Correct_Ref = {Yes},
Date-Modified = {2010-05-06 13:59:11 -0400},
Eprint = {quant-ph/0307229},
Journal = {Phys. Rev. Lett.},
Keywords = {Decoherence; Quantum Theory; Foundations},
Local-Url = {OPZ04a.pdf},
Pages = {220401},
Read = {Yes},
Source = {H. Ollivier 2004-12-03},
Title = {Objective properties from subjective quantum states: Environment as a witness},
Volume = {93},
Year = {2004}}