1.
Phys Rev Lett
; 116(20): 200401, 2016 May 20.
Artículo
en Inglés
| MEDLINE
| ID: mdl-27258856
RESUMEN
We solve the long-standing problem of making n perfect clones from m copies of one of two known pure states with minimum failure probability in the general case where the known states have arbitrary a priori probabilities. The solution emerges from a geometric formulation of the problem. This formulation reveals that cloning converges to state discrimination followed by state preparation as the number of clones goes to infinity. The convergence exhibits a phenomenon analogous to a second-order symmetry-breaking phase transition.