159 citations · 1.4k across the 75 of their papers we have counts for
66 papers · 1 filter
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…
Asymptotic distinguishability of Haar-averaged measurement models
Ludmiła Marcinkowska, Łukasz Pawela, Marcin Markiewicz +1
We study discrimination problems generated by the same basic Haar-random measurement mechanism at two observational levels. First, we derive an explicit expression for the type-II…
IntegrateUnitary.jl: A Julia package for symbolic integration over Haar measures
Łukasz Pawela, Zbigniew Puchała
Symbolic integration over the Haar measure of compact groups is a computational cornerstone in quantum information science and random matrix theory. We present \texttt{IntegrateUni…
Choi-level twirling of quantum channels: finite constructions and non-compact transformations
Marcin Markiewicz, Łukasz Pawela, Zbigniew Puchała
Twirling, i.e. averaging over symmetry actions, is a standard tool for reducing quantum states and channels to a symmetry-invariant form. We study channel twirling from the perspec…
Single-shot comparison of random quantum channels and measurements
Marcin Markiewicz, Łukasz Pawela, Zbigniew Puchała
In this work we provide an efficiency analysis of the problem of comparison of two randomly chosen quantum operations in the single-shot regime. We provide tight bounds for the suc…
Local certification of unitary operations
Ryszard Kukulski, Mateusz Stępniak, Kamil Hendzel +3
In this work, we analyze the local certification of unitary quantum channels, which is a natural extension of quantum hypothesis testing. A particular case of a quantum channel ope…
Hybrid quantum-classical computation for automatic guided vehicles scheduling
Tomasz Śmierzchalski, Jakub Pawłowski, Artur Przybysz +6
Motivated by recent efforts to develop quantum computing for practical, industrial-scale challenges, we demonstrate the effectiveness of state-of-the-art hybrid (not necessarily qu…
Resource engines
Hanna Wojewódka-Ściążko, Zbigniew Puchała, Kamil Korzekwa
In this paper we aim to push the analogy between thermodynamics and quantum resource theories one step further. Previous inspirations were based predominantly on thermodynamic cons…
Discrimination and certification of unknown quantum measurements
Aleksandra Krawiec, Łukasz Pawela, Zbigniew Puchała
We study the discrimination of von Neumann measurements in the scenario when we are given a reference measurement and some other measurement. The aim of the discrimination is to de…
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…
On the probabilistic quantum error correction
Ryszard Kukulski, Łukasz Pawela, Zbigniew Puchała
Probabilistic quantum error correction is an error-correcting procedure which uses postselection to determine if the encoded information was successfully restored. In this work, we…
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…
Post-Error Correction for Quantum Annealing Processor using Reinforcement Learning
Tomasz Śmierzchalski, Łukasz Pawela, Zbigniew Puchała +2
Finding the ground state of the Ising spin-glass is an important and challenging problem (NP-hard, in fact) in condensed matter physics. However, its applications spread far beyond…
Accessible maps in a group of classical or quantum channels
Koorosh Sadri, Fereshte Shahbeigi, Zbigniew Puchała +1
We study the problem of accessibility in a set of classical and quantum channels admitting a group structure. Group properties of the set of channels, and the structure of the clos…
Exploring Quantum Average-Case Distances: proofs, properties, and examples
Filip B. Maciejewski, Zbigniew Puchała, Michał Oszmaniec
In this work, we perform an in-depth study of recently introduced average-case quantum distances. The average-case distances approximate the average Total-Variation (TV) distance b…
Operational Quantum Average-Case Distances
Filip B. Maciejewski, Zbigniew Puchała, Michał Oszmaniec
We introduce distance measures between quantum states, measurements, and channels based on their statistical distinguishability in generic experiments. Specifically, we analyze the…
Statistical quality assessment of Ising-based annealer outputs
Krzysztof Domino, Mátyás Koniorczyk, Zbigniew Puchała
The ability to evaluate the outcomes of quantum annealers is essential for such devices to be used in complex computational tasks. We introduce a statistical test of the quality of…
Dephasing superchannels
Zbigniew Puchała, Kamil Korzekwa, Roberto Salazar +2
We characterise a class of environmental noises that decrease coherent properties of quantum channels by introducing and analysing the properties of dephasing superchannels. These…
Relating entropies of quantum channels
Dariusz Kurzyk, Łukasz Pawela, Zbigniew Puchała
In this work, we study two different approaches to defining the entropy of a quantum channel. One of these is based on the von Neumann entropy of the corresponding Choi-Jamiołkowsk…
Excluding false negative error in certification of quantum channels
Aleksandra Krawiec, Łukasz Pawela, Zbigniew Puchała
Certification of quantum channels is based on quantum hypothesis testing and involves also preparation of an input state and choosing the final measurement. This work primarily foc…
Algebraic and geometric structures inside the Birkhoff polytope
Grzegorz Rajchel-Mieldzioć, Kamil Korzekwa, Zbigniew Puchała +1
The Birkhoff polytope consisting of all bistochastic matrices of order assists researchers from many areas, including combinatorics, statistical physics and qua…
Generating random quantum channels
Ryszard Kukulski, Ion Nechita, Łukasz Pawela +2
Several techniques of generating random quantum channels, which act on the set of -dimensional quantum states, are investigated. We present three approaches to the problem of sa…
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…
Log-Convex set of Lindblad semigroups acting on -level system
Fereshte Shahbeigi, David Amaro-Alcalá, Zbigniew Puchała +1
We analyze the set of mixed unitary channels represented in the Weyl basis and accessible by a Lindblad semigroup acting on an -level quantum system. General nece…