SFI Working Paper Abstract
1990
| Title: | Optimal Detection of Nonlocal Quantum Information |
| Author(s): | Asher Peres and William K. Wootters |
| Files: | [No electronic files available.] |
| Paper #: | 90-002 |
| Abstract: | Two quantum systems are identically prepared in different locations. An observer's task is to determine their state. A simple example shows that a pair of orthogonal projections of the von Neumann type is less effective than a sequence of nonorthogonal probability-operator measures, alternating between the two quantum systems. However, the most efficient set of ‘local’ operations that we were able to design falls short of a single ‘nonlocal’ measurement, performed on both systems together. |