782 citations · 1.8k across the 12 of their papers we have counts for
11 papers · 1 filter
Improved device-independent randomness expansion rates using two sided randomness
Rutvij Bhavsar, Sammy Ragy, Roger Colbeck
A device-independent randomness expansion protocol aims to take an initial random string and generate a longer one, where the security of the protocol does not rely on knowing the…
Device-independent randomness expansion against quantum side information
Wen-Zhao Liu, Ming-Han Li, Sammy Ragy +9
The ability to produce random numbers that are unknown to any outside party is crucial for many applications. Device-independent randomness generation does not require trusted devi…
A framework for quantum-secure device-independent randomness expansion
Peter J. Brown, Sammy Ragy, Roger Colbeck
A device-independent randomness expansion protocol aims to take an initial random seed and generate a longer one without relying on details of how the devices operate for security.…
Compatibility in Multiparameter Quantum Metrology
Sammy Ragy, Marcin Jarzyna, Rafal Demkowicz-Dobrzanski
Simultaneous estimation of multiple parameters in quantum metrological models is complicated by factors relating to the (i) existence of a single probe state allowing for optimal s…
Quantification of Gaussian quantum steering
Ioannis Kogias, Antony R. Lee, Sammy Ragy +1
Einstein-Podolsky-Rosen steering incarnates a useful nonclassical correlation which sits between entanglement and Bell nonlocality. While a number of qualitative steering criteria…
Quantifying the source of enhancement in experimental continuous variable quantum illumination
Sammy Ragy, Ivano Ruo Berchera, Ivo P. Degiovanni +4
A quantum illumination protocol exploits correlated light beams to enhance the probability of detection of a partially reflecting object lying in a very noisy background. Recently…