A1 Refereed original research article in a scientific journal
Interplay between entanglement and entropy in two-qubit systems
Authors: Mazzola L, Maniscalco S, Piilo J, Suominen KA
Publisher: IOP PUBLISHING LTD
Publication year: 2010
Journal: Journal of Physics B: Atomic, Molecular and Optical Physics
Journal name in source: JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
Journal acronym: J PHYS B-AT MOL OPT
Article number: ARTN 085505
Number in series: 8
Volume: 43
Issue: 8
Number of pages: 10
ISSN: 0953-4075
DOI: https://doi.org/10.1088/0953-4075/43/8/085505
Self-archived copy’s web address: https://arxiv.org/abs/0904.2857
Abstract
We study the exact entanglement and entropy dynamics of two qubits interacting with a common zero-temperature non-Markovian reservoir. It is a commonly held view that entanglement loss due to environmental decoherence is accompanied by loss of purity of the state of the system. We demonstrate that such an intuitive picture does not always apply: the deterioration of entanglement and purity does not necessarily come together; i.e. revivals of entanglement can be accompanied by deterioration of purity. To complete our investigation on entanglement-mixedness interplay we consider the case of initial mixed states and study how the entanglement dynamics and its revivals are related to both the initial purity and the initial entanglement.
We study the exact entanglement and entropy dynamics of two qubits interacting with a common zero-temperature non-Markovian reservoir. It is a commonly held view that entanglement loss due to environmental decoherence is accompanied by loss of purity of the state of the system. We demonstrate that such an intuitive picture does not always apply: the deterioration of entanglement and purity does not necessarily come together; i.e. revivals of entanglement can be accompanied by deterioration of purity. To complete our investigation on entanglement-mixedness interplay we consider the case of initial mixed states and study how the entanglement dynamics and its revivals are related to both the initial purity and the initial entanglement.
UTU Research Portal