417 citations · 2.5k across the 29 of their papers we have counts for
6 papers · 1 filter
Optimal phase estimation and square root measurement
M. Sasaki, A. Carlini, A. Chefles
We present an optimal strategy having finite outcomes for estimating a single parameter of the displacement operator on an arbitrary finite dimensional system using a finite number…
Quantum State Discrimination
Anthony Chefles
There are fundamental limits to the accuracy with which one can determine the state of a quantum system. I give an overview of the main approaches to quantum state discrimination.…
Experimental realization of optimal detection strategies for overcomplete states
Roger B. M. Clarke, Vivien M. Kendon, Anthony Chefles +3
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 n…
Experimental Demonstration of Optimal Unambiguous State Discrimination
Roger B. M. Clarke, Anthony Chefles, Stephen M. Barnett +1
We present the first full demonstration of unambiguous state discrimination between non-orthogonal quantum states. Using a novel free space interferometer we have realised the opti…
Entanglement, Information and Multiparticle Quantum Operations
Anthony Chefles, Claire R. Gilson, Stephen M. Barnett
Collective operations on a network of spatially-separated quantum systems can be carried out using local quantum (LQ) operations, classical communication (CC) and shared entangleme…
Entanglement and Collective Quantum Operations
Anthony Chefles, Claire R. Gilson, Stephen M. Barnett
We show how shared entanglement, together with classical communication and local quantum operations, can be used to perform an arbitrary collective quantum operation upon N spatial…