3 papers
quant-ph2025
Randomness from causally independent processes
Martin Sandfuchs, Carla Ferradini, Renato Renner
We consider a pair of causally independent processes, modelled as the tensor product of two channels, acting on a possibly correlated input to produce random outputs X and Y. We sh…
quant-ph2025
Defining Security in Quantum Key Distribution
Carla Ferradini, Martin Sandfuchs, Ramona Wolf +1
The security of quantum key distribution (QKD) is quantified by a parameter , which -- under well-defined physical assumptions -- can be bounded explicitly. This con…
quant-ph2024
Device-Independent Randomness Amplification
Anatoly Kulikov, Simon Storz, Josua D. Schär +6
Successful realization of Bell tests has settled an 80-year-long debate, proving the existence of correlations which cannot be explained by a local realistic model. Recent experime…