Zobrazeno 1 - 10
of 116
pro vyhledávání: '"Fontana Enrico"'
Autor:
Cerezo, M., Larocca, Martin, García-Martín, Diego, Diaz, N. L., Braccia, Paolo, Fontana, Enrico, Rudolph, Manuel S., Bermejo, Pablo, Ijaz, Aroosa, Thanasilp, Supanut, Anschuetz, Eric R., Holmes, Zoë
A large amount of effort has recently been put into understanding the barren plateau phenomenon. In this perspective article, we face the increasingly loud elephant in the room and ask a question that has been hinted at by many but not explicitly add
Externí odkaz:
http://arxiv.org/abs/2312.09121
Autor:
Fontana, Enrico, Herman, Dylan, Chakrabarti, Shouvanik, Kumar, Niraj, Yalovetzky, Romina, Heredge, Jamie, Sureshbabu, Shree Hari, Pistoia, Marco
Publikováno v:
Nat Commun 15, 7171 (2024)
Using tools from the representation theory of compact Lie groups, we formulate a theory of Barren Plateaus (BPs) for parameterized quantum circuits whose observables lie in their dynamical Lie algebra (DLA), a setting that we term Lie algebra Support
Externí odkaz:
http://arxiv.org/abs/2309.07902
We introduce LOWESA as a classical algorithm for faithfully simulating quantum systems via a classically constructed surrogate expectation landscape. After an initial overhead to build the surrogate landscape, one can rapidly study entire families of
Externí odkaz:
http://arxiv.org/abs/2308.09109
Noise detrimentally affects quantum computations so that they not only become less accurate but also easier to simulate classically as systems scale up. We construct a classical simulation algorithm, LOWESA (low weight efficient simulation algorithm)
Externí odkaz:
http://arxiv.org/abs/2306.05400
In this paper, we aim to expand the understanding of the relationship between the composition of the Hamiltonian in the Quantum Approximate Optimization Algorithm (QAOA) and the corresponding cost landscape characteristics. QAOA is a prominent exampl
Externí odkaz:
http://arxiv.org/abs/2305.13594
Autor:
Jamet, Francois, Lindoy, Lachlan P., Rath, Yannic, Lenihan, Connor, Agarwal, Abhishek, Fontana, Enrico, Simkovic IV, Fedor, Martin, Baptiste Anselme, Rungger, Ivan
Solving the Anderson impurity model typically involves a two-step process, where one first calculates the ground state of the Hamiltonian, and then computes its dynamical properties to obtain the Green's function. Here we propose a hybrid classical/q
Externí odkaz:
http://arxiv.org/abs/2304.06587
We employ spectral analysis and compressed sensing to identify settings where a variational algorithm's cost function can be recovered purely classically or with minimal quantum computer access. We present theoretical and numerical evidence supportin
Externí odkaz:
http://arxiv.org/abs/2208.05958
We investigate the effects of noise on parameterised quantum circuits using spectral analysis and classical signal processing tools. For different noise models, we quantify the additional, higher frequency modes in the output signal caused by device
Externí odkaz:
http://arxiv.org/abs/2206.08811
Autor:
Tilly, Jules, Sriluckshmy, P. V., Patel, Akashkumar, Fontana, Enrico, Rungger, Ivan, Grant, Edward, Anderson, Robert, Tennyson, Jonathan, Booth, George H.
Publikováno v:
Phys. Rev. Research 3, 033230 (2021)
We investigate fully self-consistent multiscale quantum-classical algorithms on current generation superconducting quantum computers, in a unified approach to tackle the correlated electronic structure of large systems in both quantum chemistry and c
Externí odkaz:
http://arxiv.org/abs/2104.05531
Publikováno v:
Quantum 6, 804 (2022)
Very little is known about the cost landscape for parametrized Quantum Circuits (PQCs). Nevertheless, PQCs are employed in Quantum Neural Networks and Variational Quantum Algorithms, which may allow for near-term quantum advantage. Such applications
Externí odkaz:
http://arxiv.org/abs/2011.08763