A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Interplay between entanglement and entropy in two-qubit systems
Tekijät: Mazzola L, Maniscalco S, Piilo J, Suominen KA
Kustantaja: IOP PUBLISHING LTD
Julkaisuvuosi: 2010
Journal: Journal of Physics B: Atomic, Molecular and Optical Physics
Tietokannassa oleva lehden nimi: JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
Lehden akronyymi: J PHYS B-AT MOL OPT
Artikkelin numero: ARTN 085505
Numero sarjassa: 8
Vuosikerta: 43
Numero: 8
Sivujen määrä: 10
ISSN: 0953-4075
DOI: https://doi.org/10.1088/0953-4075/43/8/085505
Rinnakkaistallenteen osoite: https://arxiv.org/abs/0904.2857
Tiivistelmä
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.
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