Antonio Lasanta
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View article: Asymmetries of thermal processes in open quantum systems
Asymmetries of thermal processes in open quantum systems Open
An intriguing phenomenon in nonequilibrium quantum thermodynamics is the asymmetry of thermal processes. Relaxation to thermal equilibrium is the most important dissipative process, being a key concept for the design of heat engines and re…
View article: Speedups in nonequilibrium thermal relaxation: Mpemba and related effects
Speedups in nonequilibrium thermal relaxation: Mpemba and related effects Open
Most of our intuition about the behavior of physical systems is shaped by observations at or near thermal equilibrium. However, even a thermal quench can lead to states far from thermal equilibrium, where counterintuitive, anomalous effect…
View article: Asymmetries of thermal processes in open quantum systems
Asymmetries of thermal processes in open quantum systems Open
An intriguing phenomenon in non-equilibrium quantum thermodynamics is the asymmetry of thermal processes. Relaxation to thermal equilibrium is the most important dissipative process, being a key concept for the design of heat engines and r…
View article: Spacetime symmetries and geometric diffusion
Spacetime symmetries and geometric diffusion Open
We examine relativistic diffusion through the frame and observer bundles associated with a Lorentzian manifold ( M , g ). Our focus is on spacetimes with a non-trivial isometry group, and we detail the conditions required to find symmetric…
View article: Shortcuts of Freely Relaxing Systems Using Equilibrium Physical Observables
Shortcuts of Freely Relaxing Systems Using Equilibrium Physical Observables Open
Many systems, when initially placed far from equilibrium, exhibit surprising behavior in their attempt
\nto equilibrate. Striking examples are the Mpemba effect and the cooling-heating asymmetry. These
\nanomalous behaviors can be exploite…
View article: Shortcuts of freely relaxing systems using equilibrium physical observables
Shortcuts of freely relaxing systems using equilibrium physical observables Open
Many systems, when initially placed far from equilibrium, exhibit surprising behavior in their attempt to equilibrate. Striking examples are the Mpemba effect and the cooling-heating asymmetry. These anomalous behaviors can be exploited to…
View article: Heating and Cooling are Fundamentally Asymmetric and Evolve Along Distinct Pathways
Heating and Cooling are Fundamentally Asymmetric and Evolve Along Distinct Pathways Open
According to conventional wisdom, a system placed in an environment with a different temperature tends to relax to the temperature of the latter, mediated by the flows of heat and/or matter that are set solely by the temperature difference…
View article: Slow growth of magnetic domains helps fast evolution routes for out-of-equilibrium dynamics
Slow growth of magnetic domains helps fast evolution routes for out-of-equilibrium dynamics Open
Cooling and heating faster a system is a crucial problem in science, technology, and industry. Indeed, choosing the best thermal protocol to reach a desired temperature or energy is not a trivial task. Noticeably, we find that the phase tr…
View article: Kovacs Memory Effect with an Optically Levitated Nanoparticle
Kovacs Memory Effect with an Optically Levitated Nanoparticle Open
The understanding of the dynamics of nonequilibrium cooling and heating processes at the nanoscale is still an open problem. These processes can follow surprising relaxation paths due to, e.g., memory effects, which significantly alter the…
View article: Exponentially Accelerated Approach to Stationarity in Markovian Open Quantum Systems through the Mpemba Effect
Exponentially Accelerated Approach to Stationarity in Markovian Open Quantum Systems through the Mpemba Effect Open
Ergodicity-breaking and slow relaxation are intriguing aspects of nonequilibrium dynamics both in classical and in quantum settings. These phenomena are typically associated with phase transitions, e.g. the emergence of metastable regimes …
View article: Memory effects in a gas of viscoelastic particles
Memory effects in a gas of viscoelastic particles Open
We study a granular gas of viscoelastic particles (kinetic energy loss upon collision is a function of the particles' relative velocities at impact) subject to a stochastic thermostat. We show that the system displays anomalous cooling and…
View article: Exponentially accelerated approach to stationarity in Markovian open quantum systems through the Mpemba effect
Exponentially accelerated approach to stationarity in Markovian open quantum systems through the Mpemba effect Open
Ergodicity-breaking and slow relaxation are intriguing aspects of nonequilibrium dynamics both in classical and in quantum settings. These phenomena are typically associated with phase transitions, e.g. the emergence of metastable regimes …
View article: Fluctuation-induced current from freestanding graphene
Fluctuation-induced current from freestanding graphene Open
At room temperature, micron-sized sheets of freestanding graphene are in constant motion, even in the presence of an applied bias voltage. We quantify the out-of-plane movement by collecting the displacement current using a nearby small-ar…
View article: Induced correlations and rupture of molecular chaos by anisotropic dissipative Janus hard disks
Induced correlations and rupture of molecular chaos by anisotropic dissipative Janus hard disks Open
A system of smooth "frozen" Janus-type disks is studied. Such disks cannot rotate and are divided by their diameter into two sides of different inelasticities. Taking as a reference a system of colored elastic disks, we find differences in…
View article: Erratum: Energy nonequipartition in gas mixtures of inelastic rough hard spheres: The tracer limit [Phys. Rev. E <b>96</b>, 052901 (2017)]
Erratum: Energy nonequipartition in gas mixtures of inelastic rough hard spheres: The tracer limit [Phys. Rev. E <b>96</b>, 052901 (2017)] Open
This corrects the article DOI: 10.1103/PhysRevE.96.052901.
View article: Paths towards equilibrium in molecular systems: The case of water
Paths towards equilibrium in molecular systems: The case of water Open
We consider the problem of how a condensed molecular system approaches equilibrium, focusing on the particular case of water. We show, by means of extensive molecular dynamics simulations, that the existence of different types of degrees o…
View article: The Mpemba effect in spin glasses is a persistent memory effect
The Mpemba effect in spin glasses is a persistent memory effect Open
Significance The Mpemba effect, wherein an initially hotter system relaxes faster when quenched to lower temperatures than an initially cooler system, has attracted much attention. Paradoxically, its very existence is a hot topic. Using ma…
View article: Large Mpemba-like effect in a gas of inelastic rough hard spheres
Large Mpemba-like effect in a gas of inelastic rough hard spheres Open
We report the emergence of a giant Mpemba effect in the uniformly heated gas of inelastic rough hard spheres: The initially hotter sample may cool sooner than the colder one, even when the initial temperatures differ by more than one order…
View article: Mpemba effect in spin glasses: a persistent memory effect
Mpemba effect in spin glasses: a persistent memory effect Open
The Mpemba effect refers to the observation that the hotter of two identical beakers of water, put in contact with the same thermal reservoir, can cool faster under certain conditions. The phenomenon is not specific to water, as it has bee…
View article: Energy nonequipartition in gas mixtures of inelastic rough hard spheres: The tracer limit
Energy nonequipartition in gas mixtures of inelastic rough hard spheres: The tracer limit Open
The dynamical properties of a tracer or impurity particle immersed in a host gas of inelastic and rough hard spheres in the homogeneous cooling state is studied. Specifically, the breakdown of energy equipartition as characterized by the t…
View article: When the Hotter Cools More Quickly: Mpemba Effect in Granular Fluids
When the Hotter Cools More Quickly: Mpemba Effect in Granular Fluids Open
Under certain conditions, two samples of fluid at different initial temperatures present a counterintuitive behavior known as the Mpemba effect: it is the hotter system that cools sooner. Here, we show that the Mpemba effect is present in …
View article: Thermal properties of an impurity immersed in a granular gas of rough hard spheres
Thermal properties of an impurity immersed in a granular gas of rough hard spheres Open
\nWe study in this work the dynamics of a granular impurity immersed in a low-density granular gas of identical particles. For description of the kinetics of the granular gas and the impurity particles we use the rough hard sphere collisio…
View article: Lattice models for granular-like velocity fields: finite-size effects
Lattice models for granular-like velocity fields: finite-size effects Open
Long-range spatial correlations in the velocity and energy fields of a granular fluid are discussed in the framework of a 1d lattice model. The dynamics of the velocity field occurs through nearest-neighbour inelastic collisions that conse…
View article: Statistics of the dissipated energy fluctuations in driven diffusive systems
Statistics of the dissipated energy fluctuations in driven diffusive systems Open
Understanding the physics of non-equilibrium systems is one of the main open questions in statistical physics. This problem can be partially handled by investigating the macroscopic fluctuations of magnitudes that characterise the non-equi…