Entanglement is not necessary for perfect discrimination between unitary operations

Publication Type:
Journal Article
Citation:
Physical Review Letters, 2007, 98 (10)
Issue Date:
2007-03-09
Metrics:
Full metadata record
Files in This Item:
Filename Description Size
Thumbnail2008004781.pdf116.51 kB
Adobe PDF
We show that a unitary operation (quantum circuit) secretly chosen from a finite set of unitary operations can be determined with certainty by sequentially applying only a finite amount of runs of the unknown circuit. No entanglement or joint quantum operations are required in our scheme. We further show that our scheme is optimal in the sense that the number of the runs is minimal when discriminating only two unitary operations. © 2007 The American Physical Society.
Please use this identifier to cite or link to this item: