Eur. Phys. J. D (2015) 69: 232
https://doi.org/10.1140/epjd/e2015-60319-9

Regular Article

Random unitary evolution model of quantum Darwinism with pure decoherence

Institut für Angewandte Physik, Technische Universität Darmstadt, 64289 Darmstadt, Germany

^a e-mail: balaneskovic@gmx.net

Received: 29 May 2015
Received in final form: 15 August 2015
Published online: 15 October 2015

Abstract

We study the behavior of Quantum Darwinism [W.H. Zurek, Nat. Phys. 5, 181 (2009)] within the iterative, random unitary operations qubit-model of pure decoherence [J. Novotný, G. Alber, I. Jex, New J. Phys. 13, 053052 (2011)]. We conclude that Quantum Darwinism, which describes the quantum mechanical evolution of an open system S from the point of view of its environment E, is not a generic phenomenon, but depends on the specific form of input states and on the type of S-E-interactions. Furthermore, we show that within the random unitary model the concept of Quantum Darwinism enables one to explicitly construct and specify artificial input states of environment E that allow to store information about an open system S of interest with maximal efficiency.