59 citations · 253 across the 19 of their papers we have counts for
19 papers
Tensor Network Techniques for Quantum Computation
Mario Collura, Guglielmo Lami, Nishan Ranabhat +1
This book serves as an introductory yet thorough guide to tensor networks and their applications in quantum computation and quantum information, designed for advanced undergraduate…
Clifford-Dressed Variational Principles for Precise Loschmidt Echoes
Antonio Francesco Mello, Alessandro Santini, Mario Collura
We extend the recently introduced Clifford dressed Time-Dependent Variational Principle (TDVP) to efficiently compute many-body wavefunction amplitudes in the computational basis.…
Cahier de l'Institut Pascal: Noisy Quantum Dynamics and Measurement-Induced Phase Transitions
Alexios Christopoulos, Alessandro Santini, Guido Giachetti
This is a conference proceeding in the framework of workshop "OpenQMBP2023" at Institute Pascal (Orsay, France) and associated to the lecture given by Prof. Ehud Altman. We provide…
Semiclassical Quantum Trajectories in the Monitored Lipkin-Meshkov-Glick Model
Alessandro Santini, Luca Lumia, Mario Collura +1
Monitored quantum system have sparked great interest in recent years due to the possibility of observing measurement-induced phase transitions (MIPTs) in the full-counting statisti…
Clifford Dressed Time-Dependent Variational Principle
Antonio Francesco Mello, Alessandro Santini, Guglielmo Lami +2
We propose an enhanced Time-Dependent Variational Principle (TDVP) algorithm for Matrix Product States (MPS) that integrates Clifford disentangling techniques to efficiently manage…
Hybrid Stabilizer Matrix Product Operator
Antonio Francesco Mello, Alessandro Santini, Mario Collura
We introduce a novel hybrid approach combining tensor network methods with the stabilizer formalism to address the challenges of simulating many-body quantum systems. By integratin…
Dynamical deconfinement transition driven by density of excitations
Nishan Ranabhat, Alessandro Santini, Emanuele Tirrito +1
We investigate the deconfinement transition driven by excitations in long-range spin models. At low temperatures, these models exhibit a confined phase where domain-wall (or kinks)…
Continuously Monitored Quantum Systems beyond Lindblad Dynamics
Guglielmo Lami, Alessandro Santini, Mario Collura
The dynamics of a quantum system, undergoing unitary evolution and continuous monitoring, can be described in term of quantum trajectories. Although the averaged state fully charac…
Work statistics, quantum signatures and enhanced work extraction in quadratic fermionic models
Alessandro Santini, Andrea Solfanelli, Stefano Gherardini +1
In quadratic fermionic models we determine a quantum correction to the work statistics after a sudden and a time-dependent driving. Such a correction lies in the non-commutativity…
Full counting statistics as probe of measurement-induced transitions in the quantum Ising chain
Emanuele Tirrito, Alessandro Santini, Rosario Fazio +1
Non-equilibrium dynamics of many-body quantum systems under the effect of measurement protocols is attracting an increasing amount of attention. It has been recently revealed that…
Observation of partial and infinite-temperature thermalization induced by repeated measurements on a quantum hardware
Alessandro Santini, Andrea Solfanelli, Stefano Gherardini +1
On a quantum superconducting processor we observe partial and infinite-temperature thermalization induced by a sequence of repeated quantum projective measurements, interspersed by…
Spreading of a local excitation in a Quantum Hierarchical Model
Luca Capizzi, Guido Giachetti, Alessandro Santini +1
We study the dynamics of the quantum Dyson hierarchical model in its paramagnetic phase. An initial state made by a local excitation of the paramagnetic ground state is considered.…
Clean two-dimensional Floquet time-crystal
Alessandro Santini, Giuseppe E. Santoro, Mario Collura
We consider the two-dimensional quantum Ising model, in absence of disorder, subject to periodic imperfect global spin flips. We show by a combination of exact diagonalization and…
Quantum thermodynamic methods to purify a qubit on a quantum processing unit
Andrea Solfanelli, Alessandro Santini, Michele Campisi
We report on a quantum thermodynamic method to purify a qubit on a quantum processing unit (QPU) equipped with (nearly) identical qubits. Our starting point is a three qubit design…
Experimental violations of Leggett-Garg's inequalities on a quantum computer
Alessandro Santini, Vittorio Vitale
Leggett-Garg's inequalities predict sharp bounds for some classical correlation functions that address the quantum or classical nature of real-time evolutions. We experimentally ob…
Violent relaxation in the Hamiltonian mean field model: II. Non-equilibrium phase diagrams
Alessandro Santini, Guido Giachetti, Lapo Casetti
A classical long-range-interacting -particle system relaxes to thermal equilibrium on time scales growing with ; in the limit such a relaxation time diverges. H…
Experimental verification of fluctuation relations with a quantum computer
Andrea Solfanelli, Alessandro Santini, Michele Campisi
Inspired by the idea that quantum computers can be useful in advancing basic science, we use a quantum processor to experimentally validate a number of theoretical results in non-e…
Coarse-grained collisionless dynamics with long-range interactions
Guido Giachetti, Alessandro Santini, Lapo Casetti
We present an effective evolution equation for a coarse-grained distribution function of a long-range-interacting system preserving the symplectic structure of the non-collisional…
Learning universality and scaling from simple deposition models
Alessandro Santini, Paolo Politi
We use deposition models of kinetic roughening of a growing surface to introduce the concepts of universality and scaling and to analyze the qualitative and quantitative role of di…