Work

Experimental Quantum Process Discrimination

Year: 2009

Type: article

Abstract: Discrimination between unknown processes chosen from a finite set is experimentally shown to be possible even in the case of nonorthogonal processes. We demonstrate unambiguous deterministic quantum process discrimination of nonorthogonal processes using properties of entanglement, additional known unitaries, or classical communication. Single qubit measurement and unitary processes and multipartite unitaries (where the unitary acts nonseparably across two distant locations) acting on photons are discriminated with a confidence of >or=97% in all cases.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.102.160502

Authors: Anthony Laing, Terry Rudolph, Jeremy L. O’Brien

Institutions: University of Bristol, London Institute for Mathematical Sciences, Imperial College London

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: green

Funder: Engineering and Physical Sciences Research Council