UNIVERSAL ALGORITHM FOR OPTIMAL ESTIMATION OF QUANTUM STATES FROM FINITE ENSEMBLES VIA REALIZABLE GENERALIZED MEASUREMENT

Authors
DERKA R BUZEK V EKERT AK
Citation
R. Derka et al., UNIVERSAL ALGORITHM FOR OPTIMAL ESTIMATION OF QUANTUM STATES FROM FINITE ENSEMBLES VIA REALIZABLE GENERALIZED MEASUREMENT, Physical review letters, 80(8), 1998, pp. 1571-1575
Citations number
9
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
80
Issue
8
Year of publication
1998
Pages
1571 - 1575
Database
ISI
SICI code
0031-9007(1998)80:8<1571:UAFOEO>2.0.ZU;2-E
Abstract
We present a universal algorithm for the optimal quantum state estimat ion of an arbitrary finite dimensional system. The algorithm specifies a physically realizable (i.e., finite) positive operator-valued measu rement on a finite number of identically prepared systems. We illustra te the general formalism by applying it to different scenarios of the state estimation of N independent and identically prepared two-level s ystems (qubits).