110 citations · 499 across the 20 of their papers we have counts for
20 papers
Dynamical signatures of discontinuous phase transitions: How phase coexistence determines exponential versus power-law scaling
Krzysztof Ptaszynski, Massimiliano Esposito
There are conflicting reports in the literature regarding the finite-size scaling of the Liouvillian gap and dynamical fluctuations at discontinuous phase transitions, with various…
Dissipation bounds precision of current response to kinetic perturbations
Krzysztof Ptaszynski, Timur Aslyamov, Massimiliano Esposito
The precision of currents in Markov networks is bounded by dissipation via the so-called thermodynamic uncertainty relation (TUR). In our work, we demonstrate a similar inequality…
Open-system eigenstate thermalization in a noninteracting integrable model
Krzysztof Ptaszynski, Massimiliano Esposito
Significant attention has been devoted to the problem of thermalization of observables in isolated quantum setups by individual eigenstates. Here, we address this issue from an ope…
System-bath entanglement of noninteracting fermionic impurities: Equilibrium, transient, and steady-state regimes
Krzysztof Ptaszynski, Massimiliano Esposito
We investigate the behavior of entanglement between a single fermionic level and a fermionic bath in three distinct thermodynamic regimes. First, in thermal equilibrium, we analyze…
System-bath entanglement during Markovian relaxation of a fermionic impurity
Krzysztof Ptaszynski, Massimiliano Esposito
We investigate the dynamics of entanglement between the system and the environment during thermalization of a noninteracting fermionic impurity coupled to a fermionic thermal bath.…
Quantum and classical contributions to entropy production in fermionic and bosonic Gaussian systems
Krzysztof Ptaszynski, Massimiliano Esposito
As previously demonstrated, the entropy production -- a key quantity characterizing the irreversibility of thermodynamic processes -- is related to generation of correlations betwe…
Ensemble dependence of information-theoretic contributions to the entropy production
Krzysztof Ptaszynski, Massimiliano Esposito
The entropy production of an open system coupled to a reservoir initialized in a canonical state can be expressed as a sum of two microscopic information-theoretic contributions: t…
Fermionic one-body entanglement as a thermodynamic resource
Krzysztof Ptaszynski, Massimiliano Esposito
There is ongoing controversy about whether a coherent superposition of the occupied states of two fermionic modes should be regarded entangled or not, that is, whether its intrinsi…
Bounds on skewness and kurtosis of steady state currents
Krzysztof Ptaszynski
Current fluctuations are a powerful tool to unravel the underlying physics of the observed transport process. This work discusses some general properties of the third and the fourt…
Non-Markovian thermal operations boosting the performance of quantum heat engines
Krzysztof Ptaszyński
It is investigated whether non-Markovianity, i.e., the memory effects resulting from the coupling of the system to its environment, can be beneficial for the performance of quantum…
Finite-frequency noise in non-Markovian systems: A Markovian embedding approach
Krzysztof Ptaszynski
I present an approach to calculate the finite-frequency quantum noise in systems strongly coupled to structured reservoirs based on the Markovian embedding. This technique consists…
Post-thermalization via information spreading in open quantum systems
Krzysztof Ptaszynski, Massimiliano Esposito
Thermalization in open systems coupled to macroscopic environments is usually analyzed from the perspective of relaxation of the reduced state of the system to the equilibrium stat…
Entropy Production in Open Systems: The Predominant Role of Intra-Environment Correlations
Krzysztof Ptaszynski, Massimiliano Esposito
We show that the entropy production in small open systems coupled to environments made of extended baths is predominantly caused by the displacement of the environment from equilib…
Thermodynamics of Quantum Information Flows
Krzysztof Ptaszynski, Massimiliano Esposito
We report two results complementing the second law of thermodynamics for Markovian open quantum systems coupled to multiple reservoirs with different temperatures and chemical pote…
Coherence-enhanced constancy of a quantum thermoelectric generator
Krzysztof Ptaszynski
The study shows that presence of the quantum coherent, unitary component of the evolution of the system can improve constancy of heat engines, i.e., decrease fluctuations of the ou…
First-passage times in renewal and nonrenewal systems
Krzysztof Ptaszynski
Fluctuations in stochastic systems are usually characterized by the full counting statistics, which analyzes the distribution of the number of events taking place in the fixed time…
Autonomous quantum Maxwell's demon based on two exchange-coupled quantum dots
Krzysztof Ptaszynski
I study an autonomous quantum Maxwell's demon based on two exchange-coupled quantum dots attached to the spin-polarized leads. The principle of operation of the demon is based on t…
Revealing the internal spin dynamics in a double quantum dot by periodic voltage modulation
Krzysztof Ptaszynski
The paper proposes the method to analyze the internal dynamics of nanoscopic systems by periodic modulation of the electrochemical potentials of the attached leads and measuring th…
Waiting time distribution revealing the internal spin dynamics in a double quantum dot
Krzysztof Ptaszynski
Waiting time distribution and the zero-frequency full counting statistics of unidirectional electron transport through a double quantum dot molecule attached to spin-polarized lead…
Nonrenewal statistics in transport through quantum dots
Krzysztof Ptaszynski
The distribution of waiting times between successive tunneling events is an already established method to characterize current fluctuations in mesoscopic systems. Here, I investiga…