3.6k citations · 19k across the 197 of their papers we have counts for
11 papers · 2 filters
No quantum realization of extremal no-signaling boxes
Ravishankar Ramanathan, Jan Tuziemski, Michał Horodecki +1
Pure states are very important in any theory since they represent states of maximal information about the system within the theory. Here, we show that no non-trivial (not local rea…
Characterising the Performance of XOR Games and the Shannon Capacity of Graphs
Ravishankar Ramanathan, Alastair Kay, Gláucia Murta +1
In this paper we give a set of necessary and sufficient conditions such that quantum players of a two-party {\sc xor} game cannot perform any better than classical players. With an…
Method for universal detection of two-photon polarization entanglement
Karol Bartkiewicz, Paweł Horodecki, Karel Lemr +2
Detecting and quantifying quantum entanglement of a given unknown state poses problems that are fundamentally important for quantum information processing. Surprisingly, no direct…
Quantum metrology: Heisenberg limit with bound entanglement
L. Czekaj, A. Przysiezna, M. Horodecki +1
Quantum metrology allows for a huge boost in the precision of parameters estimation. However, it seems to be extremely sensitive on the noise. Bound entangled states are states wit…
Tensor product extension of entanglement witnesses and their connection with measurement device independent entanglement
A. Rutkowski, P. Horodecki
We provide a new extension of entanglement witnesses for systems. Our construction preserves the properties of indecomposability and s…
The decay of quantum correlations between quantum dot spin qubits and the characteristics of its magnetic field dependence
Paweł Mazurek, Katarzyna Roszak, Paweł Horodecki
We address the question of the role of quantum correlations beyond entanglement in context of quantum magnetometry. To this end, we study the evolution of the quantum discord, meas…