519 citations · 1.6k across the 50 of their papers we have counts for
44 papers · 1 filter
Machine Learning based Optimization of CV-QKD Under Practical Constraints
Svitlana Matsenko, Amirhossein Ghazisaeidi, Marcin Jarzyna +4
Practical hardware limitations, including finite transmitter and receiver filter lengths as well as the finite resolution of digital-to-analog and analog-to-digital converters, lea…
Photon Efficiency of High-Dimensional Quantum Key Distribution
Vera Uzunova, Marcin Jarzyna
We investigate entanglement-based quantum key distribution protocols, with particular emphasis on their efficiency under realistic conditions of satellite quantum communications, w…
Capacity of multimode quantum Gaussian channels
Maria Popławska, Marcin Jarzyna
We derive explicit formulas for the capacity of multimode quantum Gaussian channels which serve as a fundamental model for optical version of multiple-input multiple-output channel…
Deterministic feedforward-based generation of large optical coherent-state superposition
Michele N. Notarnicola, Marcin Jarzyna, Radim Filip
Large optical coherent-state superpositions are essential to advance quantum sensing, quantum repeaters and error-correction codes. We propose a deterministic feedforward protocol…
Security of Binary-Modulated Optical Key Distribution Against Quantum-Enhanced Coherent Eavesdropping
Karol Łukanowski, Michał Wójcik, Stefano Olivares +2
Optical key distribution (OKD) protects the physical layer of communication links by taking advantage of the inherent noise present in the photodetection process. It allows for eff…
Tx-Rx Mode Mismatch Effects in Gaussian-Modulated CV QKD
Mateusz Kucharczyk, Michal Jachura, Marcin Jarzyna +2
The impact of technical limitations on pulse shaping used to generate a CV QKD signal is quantified in terms of the attainable secure key rate. Optimization of key spectral efficie…
Quantum Pulse Gate Attack on IM/DD Optical Key Distribution Exploiting Symbol Shape Distortion
M. Jarzyna, M. Jachura, K. Banaszek
Intensity modulation/direct detection (IM/DD) optical key distribution (OKD) is a method to generate a secret key whose security against passive eavesdropping is guaranteed by the…
Photon information efficiency limits in deep-space optical communications
M. Jarzyna, L. Kunz, W. Zwolinski +2
Deep-space optical communication links operate under severely limited signal power, approaching the photon-starved regime which requires a receiver capable of measuring individual…
Bayesian approach to coherent combination of single photon beams
Antoni Mikos-Nuszkiewicz, Jerzy Paczos, Konrad Banaszek +1
We theoretically investigate the performance of coherent beam combination of two light beams under relative phase fluctuations in the photon starved regime. We apply a first-princi…
Beating the spectroscopic Rayleigh limit via post-processed heterodyne detection
Wiktor Krokosz, Mateusz Mazelanik, Michał Lipka +4
Quantum-inspired superresolution methods surpass the Rayleigh limit in imaging, or the analogous Fourier limit in spectroscopy. This is achieved by carefully extracting the informa…
Continuous-variable quantum key distribution over multispan links employing phase-insensitive and phase-sensitive amplifiers
Michele N. Notarnicola, Filip Cieciuch, Marcin Jarzyna
Transmission losses through optical fibers are one of the main obstacles preventing both long-distance quantum communications and continuous-variable quantum key distribution. Opti…
Optimizing state-discrimination receivers for continuous-variable quantum key distribution over a wiretap channel
Michele N. Notarnicola, Marcin Jarzyna, Stefano Olivares +1
We address a continuous-variable quantum key distribution (CV-QKD) protocol employing quaternary phase-shift-keying (QPSK) of coherent states and a non-Gaussian measurement inspire…
Quantum Limits on the Capacity of Multispan Links with Phase-sensitive Amplification
Karol Łukanowski, Konrad Banaszek, Marcin Jarzyna
Long-distance fiber communication stands as a cornerstone of modern technology. One of the underlying principles, preventing signal levels from diminishing below the detectability…
Quantum Limits on the Capacity of Multispan Links with Phase-Sensitive Amplification
Karol Łukanowski, Marcin Jarzyna, Konrad Banaszek
The capacity of a linear attenuating optical channel with the signal regenerated using quantum-limited phase-sensitive amplifiers is analyzed for conventional and generalized detec…
Quantum limits to polarization measurement of classical light
Marcin Jarzyna
Polarization of light is one of the fundamental concepts in optics. There are many ways to measure and characterise this feature of light but at the fundamental level it is quantum…
Ultimate capacity limit of a multi-span link with phase-insensitive amplification
Marcin Jarzyna, Raul Garcia-Patron, Konrad Banaszek
The Shannon capacity of a point-to-point link with an optimised configuration of optical amplifiers is compared with general detection strategies permitted by quantum mechanics. Re…
Capacity of a lossy photon channel with direct detection
Karol Łukanowski, Marcin Jarzyna
We calculate numerically the capacity of a lossy photon channel assuming photon number resolving detection at the output. We consider scenarios of input Fock and coherent states en…
Geometric approach to quantum statistical inference
Marcin Jarzyna, Jan Kolodynski
We study quantum statistical inference tasks of hypothesis testing and their canonical variations, in order to review relations between their corresponding figures of merit---measu…
Sub-Rayleigh resolution of two incoherent sources by array homodyning
Chandan Datta, Marcin Jarzyna, Yink Loong Len +3
Conventional incoherent imaging based on measuring the spatial intensity distribution in the image plane faces the resolution hurdle described by the Rayleigh diffraction criterion…
Quantum Limits in Optical Communications
Konrad Banaszek, Ludwig Kunz, Michał Jachura +1
This tutorial reviews the Holevo capacity limit as a universal tool to analyze the ultimate transmission rates in a variety of optical communication scenarios, ranging from convent…
Attaining classical capacity per unit cost of noisy bosonic Gaussian channels
Marcin Jarzyna
I show that classical capacity per unit cost of noisy bosonic Gaussian channels can be attained by employing generalized on-off keying modulation format and a projective measuremen…
Quantum Fingerprinting over AWGN Channels with Power-Limited Optical Signals
Michał Lipka, Marcin Jarzyna, Konrad Banaszek
Quantum fingerprinting reduces communication complexity of determination whether two -bit long inputs are equal or different in the simultaneous message passing model. Here we q…
Photon Efficiency Limits in the Presence of Background Noise
Konrad Banaszek, Wojciech Zwoliński, Ludwig Kunz +1
We identify theoretical limits on the photon information efficiency (PIE) of a deep-space optical communication link constrained by the average signal power and operated in the pre…
Low-cost limit of classical communication with restricted quantum measurements
Ludwig Kunz, Marcin Jarzyna, Wojciech Zwolinski +1
We consider a communication scenario where classical information is encoded in an ensemble of quantum states that admit a power series expansion in a cost parameter and with the va…