On quantum coding for ensembles of mixed states

Authors
Barnum, H Caves, CM Fuchs, CA Jozsa, R Schumacher, B
Citation
H. Barnum et al., On quantum coding for ensembles of mixed states, J PHYS A, 34(35), 2001, pp. 6767-6785
Citations number
30
Categorie Soggetti
Physics
Journal title
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL
ISSN journal
03054470 → ACNP
Volume
34
Issue
35
Year of publication
2001
Pages
6767 - 6785
Database
ISI
SICI code
0305-4470(20010907)34:35<6767:OQCFEO>2.0.ZU;2-U
Abstract
We consider the problem of optimal asymptotically faithful compression for ensembles of mixed quantum states. Although the optimal rate is unknown, we prove upper and lower bounds and describe a series of illustrative example s of compression of mixed states. We also discuss a classical analogue of t he problem.