11 citations · 33 across the 18 of their papers we have counts for
18 papers
Multipartite Bell-GHZ nonclassicality from interwoven frustrated down-conversion
Marek Żukowski, Paweł Cieśliński, Marcin Markiewicz +1
We present a theory of an interference process that starts with N coherently pumped two-mode parametric down-conversion (PDC) sources, whose output modes are directed to N observer…
Unquestionable Bell theorem for interwoven frustrated down conversion processes
Paweł Cieśliński, Jan-Åke Larsson, Marcin Markiewicz +2
Interwoven frustrated parametric down conversion (PDC) processes produce interference effects based on path identity [Phys. Rev. Lett. 118, 080401 (2017)]. In this letter we show B…
Quantum-inspired exoplanet detection in the presence of experimental imperfections
Tomasz Linowski, Konrad Schlichtholz, Giacomo Sorelli
Ideal spatial demultiplexing (SPADE) is proven to be a quantum-optimal tool for exoplanet detection, i.e., asymmetric source discrimination. However, recent investigations into the…
Unitary operator bases as universal averaging sets
Marcin Markiewicz, Konrad Schlichtholz
We provide a generalization of the idea of unitary designs to cover finite averaging over much more general operations on quantum states. Namely, we construct finite averaging sets…
On physicality of electromagnetic potential from causal structure of flux quantization
Konrad Schlichtholz, Marcin Markiewicz
Recent work by Vaidman [Phys. Rev. A 86,040101 (2012)] showed that Aharonov-Bohm effect can be explained in terms of local fields, thus effectively restating an old problem of phys…
Superresolving optical ruler based on spatial mode demultiplexing for systems evolving under Brownian motion
Konrad Schlichtholz
The development of superresolution techniques, i.e., allowing for efficient resolution below the Rayleigh limit, became one of the important branches in contemporary optics and met…
Superresolution in separation estimation between two dynamic incoherent sources using spatial demultiplexing
Konrad Schlichtholz, Łukasz Rudnicki
Achieving resolution in the sub-Rayleigh regime (superresolution) is one of the rapidly developing topics in quantum optics and metrology. Recently, it was shown that perfect measu…
Open dynamics of entanglement in mesoscopic bosonic systems
Konrad Schlichtholz, Łukasz Rudnicki
A key issue in Quantum Information is finding an adequate description of mesoscopic systems that is simpler than full quantum formalism yet retains crucial information about non-cl…
Relativistically invariant encoding of quantum information revisited
Konrad Schlichtholz, Marcin Markiewicz
In this work, we provide a detailed analysis of the issue of encoding of quantum information which is invariant with respect to arbitrary Lorentz transformations. We significantly…
"Nonlocality-of-a-single-photon" based Quantum Key Distribution and Random Number Generation schemes and their device-independent security analysis
Konrad Schlichtholz, Bianka Woloncewicz, Tamoghna Das +2
The question of ``non-locality of a single photon'', which started with a paper by Tan, Walls and Collett (TWC, 1991) stirred a thirty years long debate. This hampered attempts to…
Generalization of Gisin's Theorem to Quantum Fields
Konrad Schlichtholz, Marcin Markiewicz
We generalize Gisin's theorem on the relation between the entanglement of pure states and Bell non-classicality to the case of mode entanglement of separated groups of modes of qua…
No-go for fully unitary quantum mechanics from Bell's Theorem; comment on "Physics and Metaphysics of Wigner's Friends: Even performed pre-measurements have no results''
Konrad Schlichtholz
The purpose of this comment is to show that a reinterpretation of the results from the Letter: "Physics and Metaphysics of Wigner's Friends: Even performed pre-measurements have no…
Practical tests for sub-Rayleigh source discriminations with imperfect demultiplexers
Konrad Schlichtholz, Tomasz Linowski, Mattia Walschaers +3
Quantum-optimal discrimination between one and two closely separated light sources can be achieved by ideal spatial-mode demultiplexing, simply monitoring whether a photon is detec…
Application range of crosstalk-affected spatial demultiplexing for resolving separations between unbalanced sources
Tomasz Linowski, Konrad Schlichtholz, Giacomo Sorelli +4
Superresolution is one of the key issues at the crossroads of contemporary quantum optics and metrology. Recently, it was shown that for an idealized case of two balanced sources,…
Bosonic fields in states with undefined particle numbers possess detectable non-contextuality features, plus more
Konrad Schlichtholz, Antonio Mandarino, Marek Żukowski
Most of the paradoxical, for the classical intuition, features of quantum theory were formulated for situations which involve a fixed number of particles. While one can now find a…
Formal relation between Pegg-Barnett and Paul quantum phase frameworks
Tomasz Linowski, Konrad Schlichtholz, Łukasz Rudnicki
The problem of defining a hermitian quantum phase operator is nearly as old as quantum mechanics itself. Throughout the years, a number of solutions was proposed, ranging from abst…
Simplified Quantum Optical Stokes observables and Bell's Theorem
Konrad Schlichtholz, Bianka Woloncewicz, Marek Żukowski
We introduce a simplified form of Stokes operators for quantum optical fields that involve the known concept of binning. Behind polarization analyzer photon numbers (more generally…
Non-classicality of bright GHZ-like radiation of an optical parametric source
Konrad Schlichtholz, Bianka Woloncewicz, Marek Żukowski
With the emerging possibility to obtain emissions of triples of GHZ-entangled photons via a direct parametric generation we study here bright emissions of this kind which involve h…