25 citations · 59 across the 12 of their papers we have counts for
13 papers
Quantum instanton approach to metastable collective spin systems: Numerical implementation and applications
Maciej Chudak, Massimiliano Esposito, Krzysztof Ptaszynski
Driven-dissipative collective spin systems can host several long-lived metastable states; rare switching between them governs slow relaxation and first-order dissipative phase tran…
Quantum instanton theory for metastable collective spin systems
Krzysztof Ptaszynski, Maciej Chudak, Massimiliano Esposito
Collective spin systems -- driven-dissipative spin ensembles whose unitary and dissipative processes act uniformly on all spins, allowing their dynamics to be described as a single…
Synchronization of thermodynamically consistent stochastic phase oscillators
Maciej Chudak, Massimiliano Esposito, Krzysztof Ptaszynski
We consider a toy model of two kinetically coupled stochastic oscillators whose dynamics is described as a Markov jump process among discrete phase states. For large , it ma…
Macroscopic fluctuation-response theory and its use for gene regulatory networks
Timur Aslyamov, Krzysztof Ptaszyński, Massimiliano Esposito
Gaussian macroscopic fluctuation theory underpins the understanding of noise in a broad class of nonequilibrium systems. We derive exact fluctuation-response relations linking the…
Macroscopic theory of multipartite correlations in permutation-invariant open quantum systems
Krzysztof Ptaszynski, Maciej Chudak, Massimiliano Esposito
Information-theoretic quantities have received significant attention as system-independent measures of correlations in many-body quantum systems, e.g., as universal order parameter…
Nonequilibrium fluctuation-response relations for state-current correlations
Krzysztof Ptaszynski, Timur Aslyamov, Massimiliano Esposito
Recently, novel exact identities known as Fluctuation-Response Relations (FRRs) have been derived for nonequilibrium steady states of Markov jump processes. These identities link t…
Nonanalytic Landau functionals shaping the finite-size scaling of fluctuations and response functions in and out of equilibrium
Krzysztof Ptaszynski, Massimiliano Esposito
Landau theory relates phase transitions to the minimization of the Landau functional (e.g., free energy functional), which is expressed as a power series of the order parameter. It…
Nonequilibrium fluctuation-response relations for state observables
Krzysztof Ptaszynski, Timur Aslyamov, Massimiliano Esposito
Time-integrated state observables, which quantify the fraction of time spent by the system in a specific pool of states, are important in many fields, such as chemical sensing or t…
Critical heat current fluctuations in Curie-Weiss model in and out of equilibrium
Krzysztof Ptaszynski, Massimiliano Esposito
In some models of nonequilibrium phase transitions, fluctuations of the analyzed currents have been observed to diverge with system size. To assess whether this behavior is univers…
Nonequilibrium Fluctuation-Response Relations: From Identities to Bounds
Timur Aslyamov, Krzysztof Ptaszyński, Massimiliano Esposito
In nonequilibrium steady states of Markov jump processes, we derive exact Fluctuation-Response Relations (FRRs) that express the covariance between any pair of currents in terms of…
Dissipation enables robust extensive scaling of multipartite correlations
Krzysztof Ptaszynski, Massimiliano Esposito
We investigate the multipartite mutual information between discrete-state stochastic units interacting in a network that is invariant under unit permutations. We show that when…
Symmetry shapes thermodynamics of macroscopic quantum systems
Vasco Cavina, Ariane Soret, Timur Aslyamov +2
We derive a systematic approach to the thermodynamics of quantum systems based on the underlying symmetry groups. We show that the entropy of a system can be described in terms of…
Microscopic contributions to the entropy production at all times: From nonequilibrium steady states to global thermalization
Ayaka Usui, Krzysztof Ptaszyński, Massimiliano Esposito +1
Based on exact integration of the Schrödinger equation, we numerically study microscopic contributions to the entropy production for the single electron transistor, a paradigmatic…