39 citations · 197 across the 8 of their papers we have counts for
10 papers
Quantifying nonclassicality of vacuum-one-photon superpositions via potentials for Bell nonlocality, quantum steering, and entanglement
Adam Miranowicz, Josef Kadlec, Karol Bartkiewicz +4
Entanglement potentials are popular measures of the nonclassicality of single-mode optical fields. These potentials are defined by the amount of entanglement (measured by, e.g., th…
Experimental hierarchy of two-qubit quantum correlations without state tomography
Shilan Abo, Jan Soubusta, Kateřina Jiráková +4
A Werner state, which is the singlet Bell state affected by white noise, is a prototype example of states, which can reveal a hierarchy of quantum entanglement, steering, and Bell…
Direct method for measuring and witnessing quantum entanglement of arbitrary two-qubit states through Hong-Ou-Mandel interference
Karol Bartkiewicz, Grzegorz Chimczak, Karel Lemr
We describe a direct method for experimental determination of the negativity of an arbitrary two-qubit state with 11 measurements performed on multiple copies of the two-qubit syst…
Bell nonlocality and fully-entangled fraction measured in an entanglement-swapping device without quantum state tomography
Karol Bartkiewicz, Karel Lemr, Antonín Černoch +1
We demonstrate an efficient experimental procedure based on entanglement swapping to determine the Bell nonlocality measure of Horodecki et al. [Phys. Lett. A 200, 340 (1995)] and…
Measuring evolution of a photon in an interferometer with spectrally-resolved modes
Marek Bula, Karol Bartkiewicz, Antonín Černoch +4
In the year 2013, Danan et al. published a paper [Phys. Rev. Lett. 111, 240402 (2013)] demonstrating a counterintuitive behavior of photons in nested Mach-Zehnder interferometers.…
Knowing "where the photons have been"
Karol Bartkiewicz, Antonín Černoch, Dalibor Javůrek +3
Linear-optical interferometers play a key role in designing circuits for quantum information processing and quantum communications. Even though nested Mach-Zehnder interferometers…