23 citations · 116 across the 15 of their papers we have counts for
16 papers
On the Noisy Road to Open Quantum Dynamics: The Place of Stochastic Hamiltonians
Pietro De Checchi, Federico Gallina, Barbara Fresch +1
Stochastic evolution underpins several approaches to the dynamics of open quantum systems, such as random modulation of Hamiltonian parameters, the stochastic Schrodinger equation…
Quantum trajectories and reduced dynamics in time-correlated environments
Pietro De Checchi, Federico Gallina, Barbara Fresch +1
The stochastic Schrödinger equation (SSE) provides a trajectory-level route to simulate the dynamics of open quantum systems with applications ranging from molecular processes to q…
Influence of excitonic coupling, static disorder, and coherent dynamics in action-2D electronic spectroscopy of a molecular dimer model
Matteo Bruschi, Roberto Zambon, Federico Gallina +1
We investigate the spectral features of Action-2D Electronic Spectroscopy (A-2DES) in a molecular dimer model across different regimes of excitonic coupling. By explicitly includin…
Simulating Non-Markovian Dynamics in Multidimensional Electronic Spectroscopy via Quantum Algorithm
Federico Gallina, Matteo Bruschi, Roberto Cacciari +1
Including the effect of the molecular environment in the numerical modeling of time-resolved electronic spectroscopy remains an important challenge in computational spectroscopy. I…
From Stochastic Hamiltonian to Quantum Simulation: Exploring Memory Effects in Exciton Dynamics
Federico Gallina, Matteo Bruschi, Barbara Fresch
The unraveling of open quantum system dynamics in terms of stochastic quantum trajectories offers a picture of open system dynamics that consistently considers memory effects stemm…
Large barrier behaviour of the rate constant from the diffusion equation
Pierpaolo Pravatto, Barbara Fresch, Giorgio J. Moro
Many processes in chemistry, physics, and biology depend on thermally activated events in which the system changes its state by surmounting an activation barrier. Examples range fr…
Strategies to simulate dephasing-assisted quantum transport on digital quantum computers
Federico Gallina, Matteo Bruschi, Barbara Fresch
Simulating charge and energy transfer in extended molecular networks requires an effective model to include the environment because it significantly affects the quantum dynamics. A…
The tunneling splitting and the Kramers theory of activated processes
Pierpaolo Pravatto, Barbara Fresch, Giorgio J. Moro
The study of tunneling splitting is fundamental to get insight into the dynamics of a multitude of molecular systems. In this paper, a novel approach to the analysis of the ground-…
Quantum computing for classical problems: Variational Quantum Eigensolver for activated processes
Pierpaolo Pravatto, Davide Castaldo, Federico Gallina +3
The theory of stochastic processes impacts both physical and social sciences. At the molecular scale, stochastic dynamics is ubiquitous because of thermal fluctuations. The Fokker-…
Signatures of Anderson localization and delocalized random quantum states
Giorgio J. Moro, Giulia DalľOsto, Barbara Fresch
We consider the notion of equilibration for an isolated quantum system exhibiting Anderson localization. The system is assumed to be in a pure state, i.e., described by a wave-func…
Pilot-wave quantum theory with a single Bohm's trajectory
Francesco Avanzini, Barbara Fresch, Giorgio J. Moro
The representation of a quantum system as the spatial configuration of its constituents evolving in time as a trajectory under the action of the wave-function, is the main objectiv…
Response of quantum pure states
Barbara Fresch, Giorgio J. Moro
The response of a quantum system in a pure state to an external force is investigated by reconsidering the standard statistical approach to quantum dynamics on the light of the sta…
Beyond quantum microcanonical statistics
Barbara Fresch, Giorgio J. Moro
Descriptions of molecular systems usually refer to two distinct theoretical frameworks. On the one hand the quantum pure state, i.e. the wavefunction, of an isolated system which i…
Emergence of equilibrium thermodynamic properties in quantum pure states. II. Analysis of a spin model system
Barbara Fresch, Giorgio J. Moro
A system composed of identical spins and described by a quantum mechanical pure state is analyzed within the statistical framework presented in Part I of this work. We explicitly d…
Emergence of equilibrium thermodynamic properties in quantum pure states. I. Theory
Barbara Fresch, Giorgio J. Moro
Investigation on foundational aspects of quantum statistical mechanics recently entered a renaissance period due to novel intuitions from quantum information theory and to increasi…
Typicality in Ensembles of Quantum States: Monte Carlo Sampling versus Analytical Approximations
Barbara Fresch, Giorgio J. Moro
Random Quantum States are presently of interest in the fields of quantum information theory and quantum chaos. Moreover, a detailed study of their properties can shed light on some…