Approximate recoverability and relative entropy II: 2-positive channels of general von Neumann algebras
Journal Article
·
· Letters in Mathematical Physics
Abstract
We generalize our results in paper I in this series to quantum channels between general von Neumann algebras, proving the approximate recoverability of states which undergo a small change in relative entropy through the channel. To this end, we derive a strengthened form of the quantum data processing inequality for the change in relative entropy of two states under a channel between two von Neumann algebras. Compared to the usual inequality, there is an explicit lower bound involving the fidelity between the original state and a recovery channel.
- Research Organization:
- Univ. of Illinois at Urbana-Champaign, IL (United States)
- Sponsoring Organization:
- National Science Foundation (NSF); US Air Force Office of Scientific Research (AFOSR); USDOE; USDOE Office of Science (SC)
- Grant/Contract Number:
- SC0019517
- OSTI ID:
- 1854955
- Alternate ID(s):
- OSTI ID: 1976697
- Journal Information:
- Letters in Mathematical Physics, Journal Name: Letters in Mathematical Physics Journal Issue: 2 Vol. 112; ISSN 0377-9017
- Publisher:
- Springer Science + Business MediaCopyright Statement
- Country of Publication:
- Netherlands
- Language:
- English
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