A5033496476- Advanced Thermodynamics and Statistical Mechanics
- Quantum Mechanics and Applications
- Quantum Information and Cryptography
- Quantum many-body systems
- Spectroscopy and Quantum Chemical Studies
- Quantum optics and atomic interactions
- Quantum Electrodynamics and Casimir Effect
- Mechanical and Optical Resonators
- Atomic and Subatomic Physics Research
- Cold Atom Physics and Bose-Einstein Condensates
- Theoretical and Computational Physics
- Graphene research and applications
- Metamaterials and Metasurfaces Applications
- Thermal Radiation and Cooling Technologies
- Quantum chaos and dynamical systems
- Particle physics theoretical and experimental studies
- Neural dynamics and brain function
- Physics of Superconductivity and Magnetism
- Quantum and electron transport phenomena
- Quantum Computing Algorithms and Architecture
- Model Reduction and Neural Networks
- Random lasers and scattering media
- Quantum Chromodynamics and Particle Interactions
- Quantum, superfluid, helium dynamics
- 2D Materials and Applications
Laboratoire Jean-Alexandre Dieudonné
2025
University of Nottingham
2020-2023
Laboratoire de Mathématiques d'Orsay
2023
Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
2017-2021
University of Trieste
2016-2021
Istituto Nazionale di Fisica Nucleare
2017-2021
In the weak-coupling limit approach to open quantum systems, presence of bath is eliminated and accounted for by a master equation that introduces dissipative contributions system reduced dynamics. Within this framework, there are no entropy balance. We show that, as consequence, production fails be positive class physically legitimate (i.e., completely trace preserving) non-Markovian dynamical maps. Moreover, in absence semigroup property, if dynamics has thermal asymptotic state, need not...
We study the dynamics of an open quantum system linearly coupled to a bosonic reservoir. show that, in ultrastrong coupling limit, undergoes nonselective measurement and then evolves unitarily according effective Zeno Hamiltonian. This dynamical process is largely independent reservoir state. examine entanglement breaking effect on system. also derive evolution equation for systems contact with several reservoirs when one ultrastrong. The displays rich structure and, contrarily single case,...
Abstract We provide a characterization of energy in the form exchanged heat and work between two interacting constituents closed, bipartite, correlated quantum system. By defining binding we derive consistent formulation first law thermodynamics, which role correlations becomes evident, this reduces to standard classical picture relevant systems. next discuss emergence second thermodynamics under certain—but fairly general—conditions such as Markovian assumption. illustrate interactions...
The interaction between ultrashort light pulses and non-absorbing materials is dominated by Impulsive Stimulated Raman Scattering (ISRS). description of ISRS in the context pump\&probe experiments based on effective classical models describing phonon pulsed electromagnetic fields. Here we report a theoretical where do not make any semi-classical approximation treat both photonic phononic degrees freedom at quantum level. results model are compared with semiclassical validated means...
Abstract We study the dynamics of many-body Fermi systems, for a class initial data which are close to quasi-free states exhibiting nonvanishing pairing matrix. focus on mean-field scaling, fermionic systems is naturally coupled with semiclassical scaling. Under assumption that datum enjoys suitable structure, we give rigorous derivation time-dependent Hartree-Fock-Bogoliubov equation, nonlinear effective evolution equation generalized one-particle density matrix system, as number particles...
Quantum detailed balance conditions and quantum fluctuation relations are two important concepts in the dynamics of open systems: both concern how such systems behave when they thermalize because interaction with an environment. We prove that for thermalizing yield validity a relation (where only forward-time is considered). This implies to have (which turn enables precise formulation second law thermodynamics systems) it suffices fulfill conditions. We, however, show converse not...
Abstract In this work, we study the stochastic entropy production in open quantum systems whose time evolution is described by a class of non-unital maps. particular, as Phys Rev E 92:032129 (2015), consider Kraus operators that can be related to nonequilibrium potential. This accounts for both thermalization and equilibration non-thermal state. Unlike unital maps, non-unitality responsible an unbalance forward backward dynamics system under scrutiny. Here, concentrating on observables...
We extend previous work to describe a class of fluctuation relations (FRs) that emerge as consequence symmetries at the level stochastic trajectories in Markov chains. prove given such symmetry, and for suitable dynamical observable, it is always possible obtain FR under biased dynamics corresponding so-called generalized Doob transform. The general transformations we consider go beyond time-reversal or spatial isometries, an implication existence FRs observables irrespective their behaviour...
We derive a general scheme to obtain quantum fluctuation relations for dynamical observables in open systems. For concreteness we consider Markovian non-unitary dynamics that is unraveled terms of jump trajectories, and exploit techniques from the theory large deviations like tilted ensemble Doob transform. Our results here generalise systems previously obtained classical systems, add vast literature on domain, but without resorting standard two-point measurement scheme. illustrate our...
We study the dynamics of an open quantum system linearly coupled to a bosonic reservoir. show that, in ultrastrong coupling limit, undergoes nonselective measurement and then evolves unitarily according effective Zeno Hamiltonian. This dynamical process is largely independent reservoir state. examine entanglement breaking effect on system. also derive evolution equation for systems contact with several reservoirs when one ultrastrong. The displays rich structure and, contrarily single case,...
The thermodynamics of a qubit undergoing dephasing due to the coupling with external environment is discussed. First all, we assume dynamics system be described by master equation in Lindblad form. In this framework, review standard formulation first and second law that has been known literature for long time. After that, explicitly model set quantum harmonic oscillators choosing interaction such global bath analytically solvable recovered weak-coupling limit. generalized setting, can show...
We consider two qubits interacting with a common bosonic bath, but not directly between themselves. derive the (bipartite) entanglement generation conditions for Gaussian non-Markovian dynamical maps and show that they are similar as in Markovian regime. However, depend on different physical coefficients hold time scales. Indeed, small times, regime is possibly generated shorter scale () than (). Moreover, although singular coupling limit of dynamics yields ones, we same does lead from to...
The relation between the thermodynamic entropy production and non-Markovian evolutions is matter of current research. Here, we study behavior stochastic in open quantum systems undergoing unital dynamics. In particular, for family Pauli channels show that some specific time intervals both average variance can decrease, provided dynamics fails to be P-divisible. Although system overall irreversible, our result may interpreted as a transient tendency towards reversibility, described delta...
We study the effect of spatially correlated classical noise on both Anderson and many-body localization a disordered fermionic chain. By analyzing evolution particle density imbalance following quench from an initial charge wave state, we find prominent signatures also in presence time-dependent noise, even though system eventually relaxes to infinite temperature state. In particular, for sufficiently strong static disorder, observe onset metastability, which becomes more stronger spatial...
We study the dynamics of many-body Fermi systems, for a class initial data which are close to quasi-free states exhibiting nonvanishing pairing matrix. focus on mean-field scaling, fermionic systems is naturally coupled with semiclassical scaling. Under assumption that datum enjoys suitable structure, we give rigorous derivation time-dependent Hartree-Fock-Bogoliubov equation, nonlinear effective evolution equation one-particle density matrix system, as number particles goes infinity. Our...
The semileptonic decay asymmetry $\mathcal{A}_{\Delta m}$ is studied within the open quantum systems approach to physics of neutral meson $B^0$-$\overline{B^0}$ system: this extended treatment takes into account possible non-standard, dissipative effects induced by presence an external environment. A bound on these provided through analysis available experimental data from Belle Collaboration.
I will review the possibility to retrieve nonlinear responses in complex materials by measuring noise correlations of classical and quantum nature.
In this work, we study the stochastic entropy production in open quantum systems whose time evolution is described by a class of non-unital maps. particular, as [Phys. Rev. E 92, 032129 (2015)], consider Kraus operators that can be related to nonequilibrium potential. This accounts for both thermalization and equilibration non-thermal state. Unlike unital maps, non-unitality responsible an unbalance forward backward dynamics system under scrutiny. Here, concentrating on observables commute...