Experimental Quantum Process Discrimination

Abstract

Discrimination between unknown processes chosen from a finite set is experimentally shown to be possible even in the case of non-orthogonal processes. We demonstrate unambiguous deterministic quantum process discrimination (QPD) of non-orthogonal processes using properties of entanglement, additional known unitaries, or higher dimensional systems. Single qubit measurement and unitary processes and multipartite unitaries (where the unitary acts non-separably across two distant locations) acting on photons are discriminated with a confidence of $\ge 97$ in all cases.

4 pages, 3 figures, comments welcome. Revised version includes multi-partite QPD

References in corpus (7)

• Silica-on-Silicon Waveguide Quantum Circuits
• Unambiguous discrimination of mixed states
• Entanglement Is Not Necessary for Perfect Discrimination between Unitary Operations
• Local Distinguishability of Multipartite Unitary Operations
• Identification and Distance Measures of Measurement Apparatus
• Unitary transformations can be identified locally
• Discrimination of quantum observables using limited resources

Cited by in corpus (16)

• Advances in Quantum Cryptography
• The Perfect Distinguishability of Quantum Operations
• Experimental implementation of unambiguous quantum reading
• Optimal single shot strategies for discrimination of quantum measurements
• Experimental quantum channel discrimination using metastable states of a trapped ion
• Optimal two-copy discrimination of quantum measurements
• Identification of a reversible quantum gate: assessing the resources
• Optimal entanglement-assisted discrimination of quantum measurements
• The SWITCH test for discriminating quantum evolutions
• Optimal quantum discrimination of single-qubit unitary gates between two candidates
• Process estimation in qubit systems: a quantum decision theory approach
• Proof-of-principle experimental demonstration of quantum gate verification
• When is the Chernoff Exponent for Quantum Operations finite?
• Matchgate quantum computing and non-local process analysis
• Unambiguous discrimination of general quantum operations
• Optimal Hamiltonian recognition of unknown quantum dynamics