154 citations · 694 across the 27 of their papers we have counts for
29 papers
Non-adiabatic Optimisation via Localisation-Delocalisation Transitions
Ryan Smith, Sabrina Yue Wang, Filippo Maria Gambetta +1
The promise of efficiently solving classical optimisation problems on quantum computers is tantalizing. As many such problems can be mapped to approximating the ground state of spi…
Maximum-Entropy Extension of Quantum Correlation Functions from Short Real-Time Dynamics
Filippo Maria Gambetta, Sabrina Yue Wang, Raul A. Santos
Correlation functions are central to understanding the behavior of quantum systems, with their spectra giving direct access to quasiparticle and collective excitations. However, th…
On the stability to noise of fermion-to-qubit mappings
Guillermo González-García, Filippo Maria Gambetta, Raul A. Santos
Quantum simulations before fault tolerance suffer from the intrinsic noise present in quantum computers. In this regime, extracting meaningful results greatly benefits from stabili…
Onset of Ergodicity Across Scales on a Digital Quantum Processor
Faisal Alam, Marcos Crichigno, Elizabeth Crosson +7
Understanding how isolated quantum many-body systems thermalize remains a central question in modern physics. We study the onset of ergodicity in a two-dimensional disordered Heise…
Programmable digital quantum simulation of 2D Fermi-Hubbard dynamics using 72 superconducting qubits
Faisal Alam, Jan Lukas Bosse, Ieva Čepaitė +41
Simulating the time-dynamics of quantum many-body systems was the original use of quantum computers proposed by Feynman, motivated by the critical role of quantum interactions betw…
Fermionic dynamics on a trapped-ion quantum computer beyond exact classical simulation
Faisal Alam, Jan Lukas Bosse, Ieva Čepaitė +37
Simulation of the time-dynamics of fermionic many-body systems has long been predicted to be one of the key applications of quantum computers. Such simulations -- for which classic…
Extracting the spin excitation spectrum of a fermionic system using a quantum processor
Lucia Vilchez-Estevez, Raul A. Santos, Sabrina Yue Wang +1
Understanding low-energy excitations in fermionic systems is crucial for their characterization. They determine the response of the system to external weak perturbations, its dynam…
Unveiling quantum phase transitions from traps in variational quantum algorithms
Chenfeng Cao, Filippo Maria Gambetta, Ashley Montanaro +1
Understanding quantum phase transitions in physical systems is fundamental to characterize their behavior at low temperatures. Achieving this requires both accessing good approxima…
Efficient and practical Hamiltonian simulation from time-dependent product formulas
Jan Lukas Bosse, Andrew M. Childs, Charles Derby +3
In this work we propose an approach for implementing time-evolution of a quantum system using product formulas. The quantum algorithms we develop have provably better scaling (in t…
Towards near-term quantum simulation of materials
Laura Clinton, Toby Cubitt, Brian Flynn +6
Simulation of materials is one of the most promising applications of quantum computers. On near-term hardware the crucial constraint on these simulations is circuit depth. Many qua…
Anderson and many-body localization in the presence of spatially correlated classical noise
Stefano Marcantoni, Federico Carollo, Filippo M. Gambetta +3
We study the effect of spatially correlated classical noise on both Anderson and many-body localization of a disordered fermionic chain. By analyzing the evolution of the particle…
Observing ground-state properties of the Fermi-Hubbard model using a scalable algorithm on a quantum computer
Stasja Stanisic, Jan Lukas Bosse, Filippo Maria Gambetta +5
The famous, yet unsolved, Fermi-Hubbard model for strongly-correlated electronic systems is a prominent target for quantum computers. However, accurately representing the Fermi-Hub…
Exploring the many-body dynamics near a conical intersection with trapped Rydberg ions
Filippo Maria Gambetta, Chi Zhang, Markus Hennrich +2
Conical intersections between electronic potential energy surfaces are paradigmatic for the study of non-adiabatic processes in the excited states of large molecules. However, sinc…
Long-range multi-body interactions and three-body anti-blockade in a trapped Rydberg ion chain
Filippo Maria Gambetta, Chi Zhang, Markus Hennrich +2
Trapped Rydberg ions represent a flexible platform for quantum simulation and information processing which combines a high degree of control over electronic and vibrational degrees…
A non-equilibrium quantum many-body Rydberg atom engine
Federico Carollo, Filippo M. Gambetta, Kay Brandner +2
The standard approach to quantum engines is based on equilibrium systems and on thermodynamic transformations between Gibbs states. However, non-equilibrium quantum systems offer e…
Engineering non-binary Rydberg interactions via phonons in an optical lattice
Filippo Maria Gambetta, Weibin Li, Ferdinand Schmidt-Kaler +1
Coupling electronic and vibrational degrees of freedom of Rydberg atoms held in optical tweezer arrays offers a flexible mechanism for creating and controlling atom-atom interactio…
Classical Stochastic Discrete Time Crystals
F. M. Gambetta, F. Carollo, A. Lazarides +2
We describe a possible general and simple paradigm in a classical thermal setting for discrete time crystals (DTCs), systems with stable dynamics which is subharmonic to the drivin…
Exploring non-equilibrium phases of the generalized Dicke model with a trapped Rydberg ion quantum simulator
F. M. Gambetta, I. Lesanovsky, W. Li
Trapped ions are a versatile platform for the investigation of quantum many-body phenomena, in particular for the study of scenarios where long-range interactions are mediated by p…
Effective metal-insulator non-equilibrium quantum phase transition
S. Porta, N. Traverso Ziani, D. M. Kennes +3
We consider the steady state behavior of observables in the Su-Schrieffer-Heeger model and in the one dimensional transverse field quantum Ising model after a sudden quantum quench…
Discrete time crystals in the absence of manifest symmetries or disorder in open quantum systems
F. M. Gambetta, F. Carollo, M. Marcuzzi +2
We establish a link between metastability and a discrete time-crystalline phase in a periodically driven open quantum system. The mechanism we highlight requires neither the system…
Universal scaling of quench-induced correlations in a one-dimensional channel at finite temperature
Alessio Calzona, Filippo Maria Gambetta, Matteo Carrega +3
It has been shown that a quantum quench of interactions in a one-dimensional fermion system at zero temperature induces a universal power law in its long-time dyna…
Non-monotonic response and light-cone freezing in gapless-to-(partially) gapped quantum quenches of fermionic systems
S. Porta, F. M. Gambetta, N. Traverso Ziani +3
The properties of prototypical examples of one-dimensional fermionic systems undergoing a sudden quantum quench from a gapless state to a (partially) gapped state are analyzed. By…
Quench-induced entanglement and relaxation dynamics in Luttinger liquids
Alessio Calzona, Filippo Maria Gambetta, Fabio Cavaliere +2
We investigate the time evolution towards the asymptotic steady state of a one dimensional interacting system after a quantum quench. We show that at finite time the latter induces…
Non-equilibrium effects on charge and energy partitioning after an interaction quench
Alessio Calzona, Filippo Maria Gambetta, Matteo Carrega +2
Charge and energy fractionalization are among the most intriguing features of interacting onedimensional fermion systems. In this work we determine how these phenomena are modified…