Experimental realization of optimal detection strategies for overcomplete states

Abstract

We present the results of generalized measurements of optical polarization designed to provide one of three or four distinct outcomes. This has allowed us to discriminate between nonorthogonal polarization states with an error probability that is close to the minimum allowed by quantum theory. Employing these optimal detection strategies on sets of three (trine) or four (tetrad) equiprobable symmetric nonorthogonal polarization states, we obtain a mutual information that exceeds the maximum value attainable using conventional (von Neumann) polarization measurements.

RevTeX4, 14 pages, 10 figures (included as eps), submitted to Phys. Rev. A. Typos corrected, Sec II B rewritten, no changes to results or conclusions

References in corpus (2)

• Experimental Demonstration of Optimal Unambiguous State Discrimination
• Accessible information and optimal strategies for real symmetrical quantum sources

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