Local distinguishability of multipartite orthogonal quantum states

Authors
Walgate, J Short, AJ Hardy, L Vedral, V
Citation
J. Walgate et al., Local distinguishability of multipartite orthogonal quantum states, PHYS REV L, 85(23), 2000, pp. 4972-4975
Citations number
11
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
85
Issue
23
Year of publication
2000
Pages
4972 - 4975
Database
ISI
SICI code
0031-9007(200012)85:23<4972:LDOMOQ>2.0.ZU;2-B
Abstract
We consider one copy of a quantum system prepared in one of two orthogonal pure states, entangled or otherwise, and distributed between any number of parties. We demonstrate that it is possible to identify which of these two states the system is in by means of local operations and classical communic ation alone. The protocol we outline is both completely reliable and comple tely general; it will correctly distinguish any two orthogonal states 100% of the time.