NONLINEAR QUANTUM STATE TRANSFORMATION OF SPIN-1 2/

Citation
H. Bechmannpasquinucci et al., NONLINEAR QUANTUM STATE TRANSFORMATION OF SPIN-1 2/, Physics letters. A, 242(4-5), 1998, pp. 198-204
Citations number
9
Categorie Soggetti
Physics
Journal title
ISSN journal
03759601
Volume
242
Issue
4-5
Year of publication
1998
Pages
198 - 204
Database
ISI
SICI code
0375-9601(1998)242:4-5<198:NQSTOS>2.0.ZU;2-N
Abstract
A non-linear quantum scare transformation is presented. The transforma tion, which operates on pairs of spin-1/2, can be used to distinguish optimally between two non-orthogonal states. Similar transformations a pplied locally on each component of an entangled pair of spin-1/2 can be used to transform a mixed non-local state into a quasi-pure maximal ly entangled singlet state. In both cases the transformation makes use of the basic building block of the quantum computer, namely the quant um-XOR gale. (C) 1998 Elsevier Science B.V.