6 citations · 19 across the 13 of their papers we have counts for
15 papers
Parallel quantum channel discrimination and numerical ranges in tensor product subspaces
Adam Bílek, Paulina Lewandowska, Ryszard Kukulski
Quantum channel discrimination plays a crucial role in quantum information theory. Of particular interest is the case in which the channels can be discriminated perfectly. In this…
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…
Storage and retrieval of von Neumann measurements via indefinite causal order structures
Paulina Lewandowska, Ryszard Kukulski
This work presents the problem of learning an unknown von Neumann measurement of dimension using indefinite causal structures. In the considered scenario, we have access to …
PyQBench: a Python library for benchmarking gate-based quantum computers
Konrad Jałowiecki, Paulina Lewandowska, Łukasz Pawela
We introduce PyQBench, an innovative open-source framework for benchmarking gate-based quantum computers. PyQBench can benchmark NISQ devices by verifying their capability of discr…
Strategies for single-shot discrimination of process matrices
Paulina Lewandowska, Łukasz Pawela, Zbigniew Puchała
The topic of causality has recently gained traction quantum information research. This work examines the problem of single-shot discrimination between process matrices which are an…
Storage and retrieval of von Neumann measurements
Paulina Lewandowska, Ryszard Kukulski, Łukasz Pawela +1
This work examines the problem of learning an unknown von Neumann measurement of dimension from a finite number of copies. To obtain a faithful approximation of the given measu…
On the optimal certification of von Neumann measurements
Paulina Lewandowska, Aleksandra Krawiec, Ryszard Kukulski +2
In this report we study certification of quantum measurements, which can be viewed as the extension of quantum hypotheses testing. This extension involves also the study of the inp…
Perturbation of the numerical range of unitary matrices
Ryszard Kukulski, Paulina Lewandowska, Łukasz Pawela
In this work we show how to approach the problem of manimulating the numerical range of a unitary matrix. This task has far-reaching impact on the study of discrimination of quantu…
Optimal representation of quantum channels
Paulina Lewandowska, Ryszard Kukulski, Łukasz Pawela
This work shows an approach to reduce the dimensionality of matrix representations of quantum channels. It is achieved by finding a base of the cone of positive semidefinite matric…
Quantum walks on hypergraphs
Przemysław Sadowski, Łukasz Pawela, Paulina Lewandowska +1
In this work we introduce the concept of a quantum walk on a hypergraph. We show that the staggered quantum walk model is a special case of a quantum walk on a hypergraph.