Publication details
Entanglement measures: state ordering vs local operations
| Basic information | |
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| Original title: | Entanglement measures: state ordering vs local operations |
| Authors: | Mário Ziman, Vladimír Bužek |
| Further information | |
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| Citation: | ZIMAN, Mário  - BUŽEK, Vladimír. Entanglement measures: state ordering vs local operations. In Quantum Communication and Security (edited by Marek Żukowski, Sergei Kilin, Janusz Kowalik). Amsterdam : IOP Press, 2007. Vol. 11, ISBN 978-1-58603-749-9, pp. 196-204. NATO Science for Peace and Security Series, D: Information and Communication Security. |
| Original language: | English |
| Field: | Informatika |
| Type: | Chapter of a book |
| Keywords: | quantum information processing; entanglement |
A set of all states of a bi-partite quantum system can be divided into subsets each of which contains states with the same degree of entanglement. In this paper we address a question whether local operations (without classical communication) affect the entanglement-induced state ordering. We show that arbitrary unilocal channel (i.e., a channel that acts on one sub-system of a bi-partite system only) might change the ordering for an arbitrary nontrivial measure of entanglement. A slightly weaker result holds for the maximally entangled states. In particular, the maximally entangled states might not remain the most entangled ones at the output of a unilocal noise channel.
Related projects:
- Highly Parallel and Distributed Computing Systems
- Quantum multipartite computation, communication and security
