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The physics of boundary conditions in reaction-diffusion problems
Francesco Piazza
The use of fully or partially absorbing boundary conditions for diffusion-based problems has become paradigmatic in physical chemistry and biochemistry to describe reactions occurr…
Equilibrium and non-equilibrium furanose selection in the ribose isomerisation network
Avinash Vicholous Dass, Thomas Georgelin, Frances Westall +5
The exclusive presence of -D-ribofuranose in nucleic acids is still a conundrum in prebiotic chemistry, given that pyranose species are substantially more stable at equilibrium.…
Nonequilibrium theory of enzyme chemotaxis and enhanced diffusion
Daniel Maria Busiello, Paolo De Los Rios, Francesco Piazza
Enhanced diffusion and anti-chemotaxis of enzymes have been reported in several experiments in the last decade, opening up entirely new avenues of research in the bio-nanosciences…
Dephasing-assisted macrospin transport
S. Iubini, S. Borlenghi, A. Delin +2
Transport phenomena are ubiquitous in physics, and it is generally understood that the environmental disorder and noise deteriorates the transfer of excitations. There are however…
Diffusion-influenced reactions on non-spherical partially absorbing axisymmetric surfaces
Francesco Piazza, Denis Grebenkov
The calculation of the diffusion-controlled reaction rate for partially absorbing, non-spherical boundaries presents a formidable problem of broad relevance. In this paper we take…
On time crystallinity in dissipative Floquet systems
Achilleas Lazarides, Sthitadhi Roy, Francesco Piazza +1
We investigate the conditions under which periodically driven quantum systems subject to dissipation exhibit a stable subharmonic response. Noting that coupling to a bath introduce…
Multipartite-Entanglement Dynamics in Regular-to-Ergodic Transition: a Quantum-Fisher-Information approach
Karol Gietka, Jan Chwedeńczuk, Tomasz Wasak +1
The characterization of entanglement is a central problem for the study of quantum many-body dynamics. Here, we propose the quantum Fisher information as a useful tool for the stud…
Hopping in the crowd to unveil network topology
Malbor Asllani, Timoteo Carletti, Francesca Di Patti +2
We introduce a nonlinear operator to model diffusion on a complex undirected network under crowded conditions. We show that the asymptotic distribution of diffusing agents is a non…
Diffusion of tagged particles in a crowded medium
Marta Galanti, Duccio Fanelli, Amos Maritan +1
The influence of crowding on the diffusion of tagged particles in a dense medium is investigated in the framework of a mean-field model, derived in the continuum limit from a micro…
Nonlinear macroscopic transport equations in many-body systems from microscopic exclusion processes
Marta Galanti, Duccio Fanelli, Francesco Piazza
Describing particle transport at the macroscopic or mesoscopic level in non-ideal environments poses fundamental theoretical challenges in domains ranging from inter and intra-cell…
Persistent random walk with exclusion
Marta Galanti, Duccio Fanelli, Francesco Piazza
Modelling the propagation of a pulse in a dense {\em milieu} poses fundamental challenges at the theoretical and applied levels. To this aim, in this paper we generalize the telegr…
Absence of thermalization for systems with long-range interactions coupled to a thermal bath
Pierre de Buyl, Giovanni De Ninno, Duccio Fanelli +4
We investigate the dynamics of a small long-range interacting system, in contact with a large long-range thermal bath. Our analysis reveals the existence of striking anomalies in t…
Temperature dependence of normal mode reconstructions of protein dynamics
Francesco Piazza, Paolo De Los Rios, Fabio Cecconi
Normal mode analysis is a widely used technique for reconstructing conformational changes of proteins from the knowledge of native structures. In this Letter, we investigate to wha…
Heat wave propagation in a nonlinear chain
F. Piazza, S. Lepri
We investigate the propagation of temperature perturbations in an array of coupled nonlinear oscillators at finite temperature. We evaluate the response function at equilibrium and…
Slow energy relaxation of macromolecules and nano-clusters in solution
Francesco Piazza, Paolo De Los Rios, Yves-Henri Sanejouand
Many systems in the realm of nanophysics from both the living and inorganic world display slow relaxation kinetics of energy fluctuations. In this paper we propose a general explan…
Cooling nonlinear lattices toward localisation
F. Piazza, S. Lepri, R. Livi
We describe the energy relaxation process produced by surface damping on lattices of classical anharmonic oscillators. Spontaneous emergence of localised vibrations dramatically sl…