6 papers
Multipartite Bell-GHZ nonclassicality from interwoven frustrated down-conversion
Marek Å»ukowski, PaweÅ CieÅliÅski, 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
PaweÅ CieÅliÅski, Jan-Ã ke 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…
"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…
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…
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…