Who's afraid of not completely positive maps?
Abstract
The arguments that are often put forward to justify the singular importance given to completely positive maps over more generic maps in describing open quantum evolution are studied. We find that these do not appear convincing on closer examination. Positive as well as not positive maps are good candidates for describing open quantum evolution.
- Publication:
-
Physics Letters A
- Pub Date:
- June 2005
- DOI:
- 10.1016/j.physleta.2005.04.029
- Bibcode:
- 2005PhLA..341...48S