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6 papers · 2 filters
Large violation of Bell inequalities using both particle and wave measurements
Daniel Cavalcanti, Nicolas Brunner, Paul Skrzypczyk +2
When separated measurements on entangled quantum systems are performed, the theory predicts correlations that cannot be explained by any classical mechanism: communication is exclu…
Rapid and robust spin state amplification
Tom Close, Femi Fadugba, Simon C. Benjamin +2
Electron and nuclear spins have been employed in many of the early demonstrations of quantum technology (QT). However applications in real world QT are limited by the difficulty of…
A note on "Loophole-free Bell test for continuous variables via wave and particle correlations (Phys. Rev. Lett. 105, 170404 (2010))"
D. Cavalcanti, V. Scarani
The inequalities proposed in [Phys. Rev. Lett. 105, 170404 (2010)] are not Bell's inequalities in the usual sense: there are local classical models that violate these inequalities.…
Bipartite Entanglement in Continuous-Variable Cluster States
Hugo Cable, Daniel E. Browne
We present a study of the entanglement properties of Gaussian cluster states, proposed as a universal resource for continuous-variable quantum computing. A central aim is to compar…
Ensemble based quantum metrology
Marcus Schaffry, Erik M. Gauger, John J. L. Morton +3
The field of quantum metrology promises measurement devices that are fundamentally superior to conventional technologies. Specifically, when quantum entanglement is harnessed the p…
Optimal Detection of Entanglement in GHZ States
Alastair Kay
We present a broad class of states which are diagonal in the basis of N-qubit GHZ states such that non-positivity under the partial transpose operation is necessary and sufficient…