6 papers · 1 filter
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…
Against (unitary) interpretation (of quantum mechanics): removing the metaphysical load
Marek Żukowski, Marcin Markiewicz
In June 1925 Heisenberg arrived at Helgoland/Heligoland island to escape a fit of hay fever. He returned with a sketch of a strange theory of the micro-world, which we now call qua…
Relational Quantum Mechanics with Cross-Perspective Links Postulate: an Internally Inconsistent Scheme
Marcin Markiewicz, Marek Żukowski
We discuss the status of relative facts - the central concept of Relational Quantum Mechanics (RQM) - in the context of the new amendment to RQM called cross-perspective links post…
"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…
Relational Quantum Mechanics is Still Incompatible with Quantum Mechanics
Jay Lawrence, Marcin Markiewicz, Marek Żukowski
We showed in a recent article (Lawrence et. al., 2023, Quantum 7, 1015), that relative facts (outcomes), a central concept in Relational Quantum Mechanics, are inconsistent with Qu…