223 citations · 3.7k across the 72 of their papers we have counts for
73 papers
Operator-Space Entanglement Entropy in Random Fermionic Gaussian Dynamics
Pablo Bayona-Pena, Elena Gramellini, Lorenzo Piroli
We study the von Neumann operator-space entanglement entropy (OSEE) of initial product operators evolved under random gaussian dynamics, as modeled by a Brownian SYK model. By…
Correlation and entanglement dynamics of free fermions in disguise
Dávid Szász-Schagrin, Pablo Bayona-Pena, Lorenzo Piroli +1
We study the nonequilibrium dynamics following a quantum quench in spin chains that can be solved via a mapping to free fermions in disguise. These models feature an exponential de…
An asymmetry lower bound on fermionic non-Gaussianity
Filiberto Ares, Michele Mazzoni, Sara Murciano +3
Fermionic Gaussian states are a fundamental tool in many-body physics, faithfully representing non-interacting quantum systems and allowing for efficient numerical simulations. Giv…
Construction and simulability of quantum circuits with free fermions in disguise
Dávid Szász-Schagrin, Daniele Cristani, Lorenzo Piroli +1
We provide a systematic construction for local quantum circuits hosting free fermions in disguise, both with staircase and brickwork architectures. Similar to the original Hamilton…
Breaking global symmetries with locality-preserving operations
Michele Mazzoni, Luca Capizzi, Lorenzo Piroli
In the general framework of quantum resource theories, one typically only distinguishes between operations that can or cannot generate the resource of interest. In many-body settin…
Learning mixed quantum states in large-scale experiments
Matteo Votto, Marko Ljubotina, Cécilia Lancien +5
We present and test a protocol to learn the matrix-product operator (MPO) representation of an experimentally prepared quantum state. The protocol takes as an input classical shado…
The Hilbert-space structure of free fermions in disguise
Eric Vernier, Lorenzo Piroli
Free fermions in disguise (FFD) Hamiltonians describe spin chains which can be mapped to free fermions, but not via a Jordan-Wigner transformation. Although the mapping gives acces…
Entanglement dynamics and Page curves in random permutation circuits
Dávid Szász-Schagrin, Michele Mazzoni, Bruno Bertini +2
The characterization of ensembles of many-qubit random states and their realization via quantum circuits are crucial tasks in quantum-information theory. In this work, we study the…
Adiabatic quantum state preparation in integrable models
Maximilian Lutz, Lorenzo Piroli, Georgios Styliaris +1
We propose applying the adiabatic algorithm to prepare high-energy eigenstates of integrable models on a quantum computer. We first review the standard adiabatic algorithm to prepa…
Entanglement asymmetry dynamics in random quantum circuits
Filiberto Ares, Sara Murciano, Pasquale Calabrese +1
We study the dynamics of entanglement asymmetry in random unitary circuits (RUCs). Focusing on a local charge, we consider symmetric initial states evolved by both local one…
Generalized hydrodynamics of integrable quantum circuits
Friedrich Hübner, Eric Vernier, Lorenzo Piroli
Quantum circuits make it possible to simulate the continuous-time dynamics of a many-body Hamiltonian by implementing discrete Trotter steps of duration . However, when is s…
Approximate inverse measurement channel for shallow shadows
Riccardo Cioli, Elisa Ercolessi, Matteo Ippoliti +2
Classical shadows are a versatile tool to probe many-body quantum systems, consisting of a combination of randomised measurements and classical post-processing computations. In a r…
Monitored fermions with conserved charge
Michele Fava, Lorenzo Piroli, Denis Bernard +1
We study measurement-induced phases of free fermion systems with U(1) symmetry. Following a recent approach developed for Majorana chains, we derive a field theory description for…
Integrability of Goldilocks quantum cellular automata
Logan E. Hillberry, Lorenzo Piroli, Eric Vernier +3
Goldilocks quantum cellular automata (QCA) have been simulated on quantum hardware and produce emergent small-world correlation networks. In Goldilocks QCA, a single-qubit unitary…
Approximating many-body quantum states with quantum circuits and measurements
Lorenzo Piroli, Georgios Styliaris, J. Ignacio Cirac
We introduce protocols to prepare many-body quantum states with quantum circuits assisted by local operations and classical communication. We show that by lifting the requirement o…
Strong zero modes in integrable quantum circuits
Eric Vernier, Hsiu-Chung Yeh, Lorenzo Piroli +1
It is a classic result that certain interacting integrable spin chains host robust edge modes known as strong zero modes (SZMs). In this work, we extend this result to the Floquet…
An entanglement asymmetry study of black hole radiation
Filiberto Ares, Sara Murciano, Lorenzo Piroli +1
Hawking's discovery that black holes can evaporate through radiation emission has posed a number of questions that with time became fundamental hallmarks for a quantum theory of gr…
Many-body entropies and entanglement from polynomially-many local measurements
Benoît Vermersch, Marko Ljubotina, J. Ignacio Cirac +3
Estimating global properties of many-body quantum systems such as entropy or bipartite entanglement is a notoriously difficult task, typically requiring a number of measurements or…
Density and current statistics in boundary-driven monitored fermionic chains
Xhek Turkeshi, Lorenzo Piroli, Marco Schirò
We consider a one-dimensional system of non-interacting fermions featuring both boundary driving and continuous monitoring of the bulk particle density. Due to the measurements, th…
Nonlinear sigma models for monitored dynamics of free fermions
Michele Fava, Lorenzo Piroli, Tobias Swann +2
We derive field theory descriptions for measurement-induced phase transitions in free fermion systems. We focus on a multi-flavor Majorana chain, undergoing Hamiltonian evolution w…
Triviality of quantum trajectories close to a directed percolation transition
Lorenzo Piroli, Yaodong Li, Romain Vasseur +1
We study quantum circuits consisting of unitary gates, projective measurements, and control operations that steer the system towards a pure absorbing state. Two types of phase tran…
Integrable Digital Quantum Simulation: Generalized Gibbs Ensembles and Trotter Transitions
Eric Vernier, Bruno Bertini, Giuliano Giudici +1
The Trotter-Suzuki decomposition is a promising avenue for digital quantum simulation (DQS), approximating continuous-time dynamics by discrete Trotter steps of duration . Recen…
Generalized hydrodynamics of the repulsive spin- Fermi gas
Stefano Scopa, Pasquale Calabrese, Lorenzo Piroli
We study non-homogeneous quantum quenches in a one-dimensional gas of repulsive spin- fermions, as described by the integrable Yang-Gaudin model. By means of generalized hydro…
Generalized Deep Thermalization for Free Fermions
Maxime Lucas, Lorenzo Piroli, Jacopo De Nardis +1
In non-interacting isolated quantum systems out of equilibrium, local subsystems typically relax to non-thermal stationary states. In the standard framework, information on the res…