8 papers
Noise Resilience of Quantum Key Distribution Protocols Secured Against Independent Attacks With One-Way Communication
Adam Bílek, Ryszard Kukulski, Paulina Lewandowska +2
We investigate the resilience to noise of single-qubit quantum key distribution (QKD) protocols in the scenario of security against independent eavesdropping attacks and key distil…
A Bipartite Quantum Key Distribution Protocol Based on Indefinite Causal Order
Mateusz Leśniak, Ryszard Kukulski, Paulina Lewandowska +2
We propose a bipartite quantum key distribution (QKD) protocol based on causal nonseparability: the presence of a resource -- a process matrix -- that does not correspond to any de…
Resource-Efficient Variational Quantum Classifier
Petr Ptáček, Paulina Lewandowska, Ryszard Kukulski
We introduce the unambiguous quantum classifier based on Hamming distance measurements combined with classical post-processing. The proposed approach improves classification perfor…
Benchmarking gate-based quantum devices via certification of qubit von Neumann measurements
Paulina Lewandowska, Martin Beseda
We present an updated version of PyQBench, an open-source Python library designed for benchmarking gate-based quantum computers, with a focus on certifying qubit von Neumann measur…
Experimental study of multiple-shot unitary channels discrimination using the IBM Q computers
Adam Bílek, Jan Hlisnikovský, Tomáš Bezděk +2
Tasks involving black boxes appear frequently in quantum computer science. An example that has been deeply studied is quantum channel discrimination. In this work, we study the dis…
Shared entanglement for three-party causal order guessing game
Ryszard Kukulski, Paulina Lewandowska, Karol Życzkowski
In a variant of communication tasks, players cooperate in choosing their local strategies to compute a given task later, working separately. Utilizing quantum bits for communicatio…