241 citations · 1.8k across the 67 of their papers we have counts for
67 papers
Exposing Hypersensitivity in Quantum Chaotic Dynamics
Andrzej Grudka, Paweł Kurzyński, Adam S. Sajna +2
We demonstrate that the unitary dynamics of a multi-qubit system can display hypersensitivity to initial state perturbation. This contradicts the common belief that the classical a…
Superluminal observers do not explain quantum superpositions
Andrzej Grudka, Jȩdrzej Stempin, Jan Wójcik +1
The quantum description of reality is quite different from the classical one. Understanding this difference at a fundamental level is still an interesting topic. Recently, Dragan a…
Relative homotopy approach to topological phases in quantum walks
Andrzej Grudka, Marcin Karczewski, Pawel Kurzynski +2
Discrete-time quantum walks (DTQWs) provide a convenient platform for a realisation of many topological phases in noninteracting systems. They often offer more possibilities than s…
Complementarity in quantum walks
Andrzej Grudka, Pawel Kurzynski, Tomasz P. Polak +3
We study discrete-time quantum walks on -cycles with a position and coin-dependent phase-shift. Such a model simulates a dynamics of a quantum particle moving on a ring with an…
Galilean invariance without superluminal particles
Andrzej Grudka, Antoni Wojcik
Recently Dragan and Ekert [New. J. Phys 22, 033038, 2020] presented arguments that probabilistic dynamics inherent in the realm of quantum physics is related to the propagation of…
On Quantum Semipermeable Barriers: Investigating Maxwell's Demon Toolbox
Andrzej Grudka, Pawel Kurzynski, Antoni Wojcik
We study quantum Maxwell's demon in a discrete space-time setup. We consider a collection of particles hopping on a one-dimensional chain and a semipermeable barrier that allows th…