78 citations · 131 across the 11 of their papers we have counts for
11 papers
Non-equilibrium quantum thermometry with bosonic samples
Marek Winczewski, Michał Horodecki, Ricard Ravell Rodríguez
We study low-temperature non-equilibrium quantum thermometry with a bosonic probe: a quantum harmonic oscillator strongly coupled to a bosonic bath at temperature through a Dru…
Quantification of the energy consumption of entanglement distribution
Karol Horodecki, Marek Winczewski, Leonard Sikorski +3
Inspired by environmental sciences, we develop a framework to quantify the energy needed to generate quantum entanglement via noisy quantum channels, focusing on the hardware-indep…
Fundamental Limitations within the Selected Cryptographic Scenarios and Supra-Quantum Theories
Marek Winczewski
The following submission constitutes a guide and an introduction to a collection of articles submitted as a Ph.D. dissertation at the University of Gdańsk. In the dissertation, we…
Corrections to the Hamiltonian induced by finite-strength coupling to the environment
Marcin Łobejko, Marek Winczewski, Gerardo Suárez +2
If a quantum system interacts with the environment, then the Hamiltonian acquires a correction known as the Lamb-shift term. There are two other corrections to the Hamiltonian, rel…
Renormalization in the Theory of Open Quantum Systems via the Self-Consistency Condition
Marek Winczewski, Robert Alicki
We investigate the topic of renormalization in the theory of weakly interacting open quantum systems. Our starting point is an open quantum system interacting with a single heat ba…
Fundamental limitations on the device-independent quantum conference key agreement
Karol Horodecki, Marek Winczewski, Siddhartha Das
We provide several general upper bounds on the rate of a key secure against a quantum adversary in the device-independent conference key agreement (DI-CKA) scenario. They include b…
Intermediate Times Dilemma for Open Quantum System: Filtered Approximation to The Refined Weak Coupling Limit
Marek Winczewski, Antonio Mandarino, Gerardo Suarez +2
The famous Davies-GKSL secular Markovian master equation is tremendously successful in approximating the evolution of open quantum systems in terms of just a few parameters. Howeve…
Hybrid quantum network design against unauthorized secret-key generation, and its memory cost
Omer Sakarya, Marek Winczewski, Adam Rutkowski +1
A significant number of servers that constitute the Internet are to provide private data via private communication channels to mutually anonymous registered users. Such are the ser…
Universal Limitations on Quantum Key Distribution over a Network
Siddhartha Das, Stefan Bäuml, Marek Winczewski +1
We consider the distribution of secret keys, both in a bipartite and a multipartite (conference) setting, via a quantum network and establish a framework to obtain bounds on the ac…
Limitations on device independent key secure against non signaling adversary via the squashed non-locality
Marek Winczewski, Tamoghna Das, Karol Horodecki
We initiate a systematic study to provide upper bounds on device-independent key, secure against a non-signaling adversary (NSDI). We employ the idea of "squashing" on the secrecy…
Complete extension: the non-signaling analog of quantum purification
Marek Winczewski, Tamoghna Das, John H. Selby +5
Deriving quantum mechanics from information-theoretic postulates is a recent research direction taken, in part, with the view of finding a beyond-quantum theory; once the postulate…