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10 papers · 2 filters
Quantum origins of objectivity
R. Horodecki, J. K. Korbicz, P. Horodecki
In spite of all of its successes, quantum mechanics leaves us with a central problem: How does Nature create a "foot-bridge" from fragile quanta to the objective world of everyday…
Quantum mechanical which-way experiment with an internal degree of freedom
Konrad Banaszek, Pawel Horodecki, Michal Karpinski +1
For a particle travelling through an interferometer, the trade-off between the available which-way information and the interference visibility provides a lucid manifestation of the…
Robust Device-Independent Randomness Amplification with Few Devices
Fernando G. S. L. Brandao, Ravishankar Ramanathan, Andrzej Grudka +5
Randomness amplification is the task of transforming a source of somewhat random bits into a source of fully random bits. Although it is impossible to amplify randomness from a sin…
Device-independent quantum key distribution based on measurement inputs
Ramij Rahaman, Matthew G. Parker, Piotr Mironowicz +1
We provide an analysis of a new family of device independent quantum key distribution (QKD) protocols with several novel features: (a) The bits used for the secret key do not come…
Can communication power of separable correlations exceed that of entanglement resource?
Paweł Horodecki, Jan Tuziemski, Paweł Mazurek +1
The scenario of remote state preparation with shared correlated quantum state and one bit of forward communication [B. Dakic et al. Nature Physics 8, 666-670 (2012)] is considered.…
Robustness of quantum randomness expansion protocols in the presence of noise
Piotr Mironowicz, Marcin Pawłowski
In this paper we investigate properties of several randomness generation protocols in the device independent framework. Using Bell-type inequalities it is possible to certify that…