2005/05/24 by Massimiliano F. Sacchi · 2 citations
Physics and Astronomy · #quant-ph
paper · pdf · doi:10.1103/physreva.71.062340
published as Phys. Rev. A 71, 062340 (2005) · 4 pages, no figures
arxiv created 2005/05/24 · arxiv updated 2009/12/01
We address the problem of discriminating with minimal error probability two given quantum operations. We show that the use of entangled input states generally improves the discrimination. For Pauli channels we provide a complete comparison of the optimal strategies where either entangled or unentangled input states are used.