29 citations · 117 across the 10 of their papers we have counts for
9 papers
Calibration of single-photon cameras using radioluminescent light sources
Radek Machulka, Václav Michálek, Ondřej Haderka +1
In this paper, we address the calibration of the quantum efficiency of single-photon cameras using radioluminescent light sources. The proposed methods are subsequently compared wi…
Quantumness and its hierarchies in PT-symmetric down-conversion models
Jan Peřina, Karol Bartkiewicz, Grzegorz Chimczak +4
We investigate the hierarchy of quantum correlations in a quadratic bosonic parity-time-symmetric system (PTSS) featuring distinct dissipation and amplification channels. The hiera…
Efficient Characterization of N-Beam Gaussian Fields Through Photon-Number Measurements: Quantum Universal Invariants
Nazarii Sudak, Artur Barasiński, Jan Peřina +1
Quantum universal invariants of general N-beam Gaussian fields are investigated from the point of view of fields' intensity moments. A method that uniquely links these invariants,…
Quantum Correlations in Three-Beam Symmetric Gaussian States Accessed via Photon-Number-Resolving Detection and Quantum Universal Invariants
Jan Peřina, Nazarii Sudak, Artur Barasiński +1
Quantum correlations of 3-beam symmetric Gaussian states are analyzed using their quantum universal invariants. These invariants, 1-, 2-, and 3-beam purities, are expressed in term…
Retrieving the Covariance Matrix of an Unknown Two-Mode Gaussian State by Means of a Reference Twin Beam
Ievgen I. Arkhipov, Jan Peřina
A method for revealing the covariance matrix of an unknown two-mode Gaussian state is given based on the interference with a reference twin beam whose covariance matrix is known. I…
Interplay of nonclassicality and entanglement of two-mode Gaussian fields generated in optical parametric processes
Ievgen I. Arkhipov, Jan Peřina, Adam Miranowicz
The behavior of general nonclassical two-mode Gaussian states at a beam splitter is investigated. Single-mode nonclassicality as well as two-mode entanglement of both input and out…
Quantum correlation and entanglement between an ionizing system and a neighbor atom interacting directly and via a quantized field
Vlasta Peřinová, Antonín Lukš, Jaromír Křepelka +1
Quantum correlations between two neighbor atoms are studied. It is assumed that one atomic system comprises a single auto-ionizing level and the other atom does not contain any aut…
High spatial entanglement via chirped quasi-phase-matched optical parametric down-conversion
Jiří Svozilík, Jan Peřina, Juan P. Torres
By making use of the spatial shape of paired photons, parametric down-conversion allows the generation of two-photon entanglement in a multidimensional Hilbert space. How much enta…
Spatial and spectral properties of the pulsed second-harmonic generation in a PP-KTP waveguide
Radek Machulka, Jiří Svozilík, Jan Soubusta +2
Spatial and spectral properties of the pulsed second harmonic generation in a periodically-poled KTP waveguide exploiting simultaneously the first, second, and third harmonics of p…