443 citations · 2.8k across the 52 of their papers we have counts for
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Bit flips are erasures in dissipative cat qubits
Filippo Ferrari, Joachim Cohen, Vincenzo Savona +1
Autonomous quantum error correction (QEC) stabilizes a logical manifold through dissipative events that emit into output channels, which are typically accessible to measurement. Th…
Bit flips, saturation, and quantum chaos in dissipative cat qubits
Filippo Ferrari, Joachim Cohen, Vincenzo Savona +1
Bosonic cat qubits promise hardware-efficient quantum error correction because their logical bit-flip rate is exponentially suppressed with the photon number of the cat state. Howe…
Chaos and thermalization in open quantum systems
Filippo Ferrari, Vincenzo Savona, Fabrizio Minganti
The eigenstate thermalization hypothesis (ETH) provides a cornerstone for understanding thermalization in isolated quantum systems, linking quantum chaos with statistical mechanics…
Variational Perturbation Theory in Open Quantum Systems for Efficient Steady State Computation
André Melo, Gaspard Beugnot, Fabrizio Minganti
Determining the steady state of an open quantum system is crucial for characterizing quantum devices and studying various physical phenomena. Often, computing a single steady state…
Chiral cat code: Enhanced error correction induced by higher-order nonlinearities
Adrià Labay-Mora, Alberto Mercurio, Vincenzo Savona +2
We introduce a Schrödinger chiral cat qubit, a novel bosonic quantum code generalizing Kerr cat qubits that exploits higher-order nonlinearities. Compared to a standard Kerr cat, t…
Chaos in Time: A Dissipative Continuous Quasi Time Crystals
Parvinder Solanki, Fabrizio Minganti
While a generic open quantum system decays to its steady state, continuous time crystals (CTCs) develop spontaneous oscillation and never converge to a stationary state. Just as cr…
Criticality-Enhanced Quantum Sensing with a Parametric Superconducting Resonator
Guillaume Beaulieu, Fabrizio Minganti, Simone Frasca +4
Quantum metrology, a cornerstone of quantum technologies, exploits entanglement and superposition to achieve higher precision than classical protocols in parameter estimation tasks…
Chaotic and quantum dynamics in driven-dissipative bosonic chains
Filippo Ferrari, Fabrizio Minganti, Camille Aron +1
Thermalization in quantum many-body systems typically unfolds over timescales governed by intrinsic relaxation mechanisms. Yet, its spatial aspect is less understood. We investigat…
Open quantum systems -- A brief introduction
Fabrizio Minganti, Alberto Biella
This text is a short introduction to the physics of driven-dissipative many-body systems, focusing on a few selected topics. Beyond its more ``historical'' interest in the study of…
Landau-Zener without a Qubit: Unveiling Multiphoton Interference, Synthetic Floquet Dimensions, and Dissipative Quantum Chaos
Leo Peyruchat, Fabrizio Minganti, Marco Scigliuzzo +5
Landau-Zener-Stückelberg-Majorana (LZSM) interference occurs when qubit parameters are periodically modulated across avoided level crossings. We explore this phenomenon in nonlinea…
Restoring Adiabatic State Transfer in Time-Modulated Non-Hermitian Systems
Ievgen I. Arkhipov, Fabrizio Minganti, Adam Miranowicz +2
Non-Hermitian systems have attracted much interest in recent decades, driven partly by the existence of exotic spectral singularities, known as exceptional points (EPs), where the…
Observation of first- and second-order dissipative phase transitions in a two-photon driven Kerr resonator
Guillaume Beaulieu, Fabrizio Minganti, Simone Frasca +4
In open quantum systems, first- and second-order dissipative phase transitions (DPTs) can emerge in the thermodynamic limit from the competition between unitary evolution, driving…
Phonon Pumping by Modulating the Ultrastrong Vacuum
Fabrizio Minganti, Alberto Mercurio, Fabio Mauceri +3
The vacuum (i.e., the ground state) of a system in ultrastrong light-matter coupling contains particles that cannot be emitted without any dynamical perturbation and is thus called…
Coherent-State Ladder Time-Dependent Variational Principle for Open Quantum Systems
David S. Schlegel, Fabrizio Minganti, Vincenzo Savona
We present a new paradigm for the dynamical simulation of interacting many-boson open quantum systems. The method relies on a variational ansatz for the -boson density matrix, i…
Dissipative Quantum Chaos unveiled by Stochastic Quantum Trajectories
Filippo Ferrari, Luca Gravina, Debbie Eeltink +3
We define quantum chaos and integrability in open quantum many-body systems as a dynamical property of single stochastic realizations, referred to as quantum trajectories. This def…
Dissipative phase transitions in -photon driven quantum nonlinear resonators
Fabrizio Minganti, Vincenzo Savona, Alberto Biella
We investigate and characterize the emergence of finite-component dissipative phase transitions (DPTs) in nonlinear photon resonators subject to -photon driving and dissipation.…
High-kinetic inductance NbN films for high-quality compact superconducting resonators
Simone Frasca, Ivo Nikolaev Arabadzhiev, Sebastien Yves Bros de Puechredon +7
Niobium nitride (NbN) is a particularly promising material for quantum technology applications, as entails the degree of reproducibility necessary for large-scale of superconductin…
-photon blockade with an -photon parametric drive
Yan-Hui Zhou, Fabrizio Minganti, Wei Qin +5
We propose a mechanism to engineer an -photon blockade in a nonlinear cavity with an -photon parametric drive . When an -photon-excitation reson…
A critical Schrödinger cat qubit
Luca Gravina, Fabrizio Minganti, Vincenzo Savona
Encoding quantum information onto bosonic systems is a promising route to quantum error correction. In a cat code, this encoding relies on the confinement of the system's dynamics…
Creating and controlling exceptional points of non-Hermitian Hamiltonians via homodyne Lindbladian invariance
Fabrizio Minganti, Dolf Huybrechts, Cyril Elouard +2
The Exceptional Points (EPs) of non-Hermitian Hamiltonians (NHHs) are spectral degeneracies associated with coalescing eigenvalues and eigenvectors which are associated with remark…
Fully solvable finite simplex lattices with open boundaries in arbitrary dimensions
Ievgen I. Arkhipov, Adam Miranowicz, Franco Nori +2
Finite simplex lattice models are used in different branches of science, e.g., in condensed matter physics, when studying frustrated magnetic systems and non-Hermitian localization…
Non-Gaussian superradiant transition via three-body ultrastrong coupling
Fabrizio Minganti, Louis Garbe, Alexandre Le Boité +1
We introduce a class of quantum optical Hamiltonian characterized by three-body couplings, and propose a circuit-QED scheme based on state-of-the-art technology that implements the…
Quantum error correction using squeezed Schrödinger cat states
David S. Schlegel, Fabrizio Minganti, Vincenzo Savona
Bosonic quantum codes redundantly encode quantum information in the states of a quantum harmonic oscillator, making it possible to detect and correct errors. Schrödinger cat codes…
Dispersive qubit readout with machine learning
Enrico Rinaldi, Roberto Di Candia, Simone Felicetti +1
Open quantum systems can undergo dissipative phase transitions, and their critical behavior can be exploited in sensing applications. For example, it can be used to enhance the fid…