Cited by 179Quantum Mechanics and ApplicationsQuantum Information and CryptographyAdvanced Thermodynamics and Statistical Mechanics

Optimal state pairs for non-Markovian quantum dynamics

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Wißmann, Steffen, Karlsson, Antti, Laine, Elsi-Mari, Piilo, Jyrki, Breuer, Heinz-Peter·2012·Physical Review A

Abstract

We study a recently proposed measure for the quantification of quantum non-Markovianity in the dynamics of open systems which is based on the exchange of information between the open system and its environment. This measure relates the degree of memory effects to certain optimal initial state pairs featuring a maximal flow of information from the environment back to the open system. We rigorously prove that the states of these optimal pairs must lie on the boundary of the space of physical states and that they must be orthogonal. This implies that quantum memory effects are maximal for states which are initially distinguishable with certainty, having a maximal information content. Moreover, we construct an explicit example which demonstrates that optimal quantum states need not be pure states.

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  1. [21]M. Hayashi, Quantum Information (Springer-Verlag, Berlin, 2006).

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Authors
Wißmann, S., Karlsson, A., Laine, E.-M., Piilo, J., & Breuer, H.-P.
Affiliations
  • University of Freiburg (DE)
  • University of Turku (FI)
Venue
Physical Review A
Published
2012-12-17
Volume
86
Issue
6
ISSN
  • 0556-2791 (ISSN-L)
  • 1050-2947
  • 1094-1622
OpenAlex
W2083572972
Cited by
179
References
22
Citations by year
2026: 6 · 2025: 10 · 2024: 19 · 2023: 6 · 2022: 8 · 2021: 14 · 2020: 5 · 2019: 23 · 2018: 15 · 2017: 15 · 2016: 14 · 2015: 14 · 2014: 18 · 2013: 12
FWCI
7.27
Type
journal article
Language
en
Open access
Locations
  • Physical Review A (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • FreiDok plus (Universitätsbibliothek Freiburg) (submittedVersion)
  • arXiv (Cornell University)
Topics
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum Mechanics and Applications
  • Physical Sciences › Computer Science › Artificial Intelligence › Quantum Information and Cryptography
  • Physical Sciences › Physics and Astronomy › Statistical and Nonlinear Physics › Advanced Thermodynamics and Statistical Mechanics
Keywords
quantum non-Markovianity, open quantum systems, information flow, quantum memory effects, distinguishability, orthogonal states, mixed states

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