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- University of GdańskPL161 papers
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- Los Alamos National LaboratoryUS25 papers
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11 papers · 2 filters
Quantum randomness protected against detection loophole attacks
Piotr Mironowicz, Gustavo Cañas, Jaime Cariñe +6
Device and semi-device independent quantum randomness generators (DI- and SDI-QRNGs) are crucial for applications requiring private randomness. However, they are vulnerable to dete…
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…
Properties of dimension witnesses and their semi-definite programming relaxations
Piotr Mironowicz, Hong-Wei Li, Marcin Pawłowski
In this paper we develop a method for investigating semi-device-independent randomness expansion protocols that was introduced in [Li et al., Phys. Rev. A , 020302(R)…
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…