Dependence of decoherence-assisted classicality on the ways a system is partitioned into subsystems

Abstract

Choosing a specific way of dividing a closed system into parts is a starting point for the decoherence program and for the quantum thermalization program. It is shown that one can always chose such way of partitioning that decoherence-assisted classicality does not emerge and thermalization does not occur. Implications of this result are discussed.

Presented at DICE-2012 workshop under title "Resolution into subsystems, decoherence and thermalization". v2: Title changed, presentation improved, discussion extended, references added. Accepted to Phys. Rev. A

References in corpus (4)

• Thermalization and its mechanism for generic isolated quantum systems
• Foundation of Statistical Mechanics under experimentally realistic conditions
• Absence of Thermalization in Nonintegrable Systems
• Pure State Quantum Statistical Mechanics