Kraus representation in the presence of initial correlations
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We examine the validity of the Kraus representation in the presence of initial correlations and show that it is assured only when a joint dynamics is locally unitary.
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A map Φ from n×n matrices to m×m matrices is linear if and only if it can be represented in an operator sum representation with left and right operation elements.
“Theorem 1 A map Φ : M n ↦→ M m (where M n is the space of n × n matrices) is linear iff it can be represented as”
From Vanishing Quantum Discord is Necessary and Sufficient for Completely Positive Maps (2009) · cites this paper as [15]
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- Authors
- Hayashi, H., Kimura, G., & Ota, Y.
- Affiliations
- Waseda University (JP)
- Venue
- Physical Review A
- Publisher
- American Physical Society (APS)
- Published
- 2003-06-26
- Volume
- 67
- Issue
- 6
- ISSN
- 0556-2791 (ISSN-L)
- 1050-2947
- 1094-1622
- OpenAlex
- W2000848218
- Cited by
- 53
- References
- 12
- Citations by year
- 2025: 2 · 2024: 1 · 2023: 3 · 2022: 1 · 2019: 2 · 2018: 1 · 2017: 3 · 2016: 5 · 2015: 3 · 2014: 2 · 2013: 3 · 2012: 2
- FWCI
- 3.91
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- Physical Review A (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- CERN Document Server (European Organization for Nuclear Research) (submittedVersion)
- arXiv (Cornell University)
- Topics
- Physical Sciences › Computer Science › Artificial Intelligence › Quantum Information and Cryptography
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum Mechanics and Applications
- Physical Sciences › Physics and Astronomy › Statistical and Nonlinear Physics › Advanced Thermodynamics and Statistical Mechanics
- Keywords
- Kraus representation, initial correlations, open quantum systems, joint dynamics, quantum channels
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