108 citations · 244 across the 4 of their papers we have counts for
7 papers · 1 filter
Accuracy of minimal and optimal qubit tomography for finite-length experiments
Alex Ling, Antia Lamas-Linares, Christian Kurtsiefer
Practical quantum state tomography is usually performed by carrying out repeated measurements on many copies of a given state. The accuracy of the reconstruction depends strongly o…
Experimental quantum key distribution based on a Bell test
Alexander Ling, Matthew P. Peloso, Ivan Marcikic +3
We report on a complete free-space field implementation of a modified Ekert91 protocol for quantum key distribution using entangled photon pairs. For each photon pair we perform a…
Testing quantum correlations versus single-particle properties within Leggett's model and beyond
Cyril Branciard, Nicolas Brunner, Nicolas Gisin +4
Quantum theory predicts and experiments confirm that nature can produce correlations between distant events that are nonlocal in the sense of violating a Bell inequality. Neverthel…
Absolute emission rates of Spontaneous Parametric Down Conversion into single transverse Gaussian modes
Alexander Ling, Antia Lamas-Linares, Christian Kurtsiefer
We provide an estimate on the absolute values of the emission rate of photon pairs produced by spontaneous parametric down conversion in a bulk crystal when all interacting fields…
Experimental Falsification of Leggett's Non-Local Variable Model
Cyril Branciard, Alexander Ling, Nicolas Gisin +3
Bell's theorem guarantees that no model based on local variables can reproduce quantum correlations. Also some models based on non-local variables, if subject to apparently "reason…
Experimental Polarization State Tomography using Optimal Polarimeters
Alexander Ling, Soh Kee Pang, Antia Lamas-Linares +1
We report on the experimental implementation of a polarimeter based on a scheme known to be optimal for obtaining the polarization vector of ensembles of spin-1/2 quantum systems,…