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of 171
pro vyhledávání: '"Kemper, Alexander"'
We provide a classification of all dynamical Lie algebras generated by 2-local spin interactions on undirected graphs. Building on our previous work where we provided such a classification for spin chains, here we consider the more general case of un
Externí odkaz:
http://arxiv.org/abs/2409.19797
Autor:
Agrawal, Anjali A., Job, Joshua, Wilson, Tyler L., Saadatmand, S. N., Hodson, Mark J., Mutus, Josh Y., Caesura, Athena, Johnson, Peter D., Elenewski, Justin E., Morrell, Kaitlyn J., Kemper, Alexander F.
Understanding the physics of strongly correlated materials is one of the grand challenge problems for physics today. A large class of scientifically interesting materials, from high-$T_c$ superconductors to spin liquids, involve medium to strong corr
Externí odkaz:
http://arxiv.org/abs/2406.06511
In the current framework of Geometric Quantum Machine Learning, the canonical method for constructing a variational ansatz that respects the symmetry of some group action is by forcing the circuit to be equivariant, i.e., to commute with the action o
Externí odkaz:
http://arxiv.org/abs/2406.04418
Imaginary-time response functions of finite-temperature quantum systems are often obtained with methods that exhibit stochastic or systematic errors. Reducing these errors comes at a large computational cost -- in quantum Monte Carlo simulations, the
Externí odkaz:
http://arxiv.org/abs/2403.12349
Autor:
Scott, Kirsty, Kisiel, Elliot, Yakhou, Flora, Agrestini, Stefano, Garcia-Fernandez, Mirian, Kummer, Kurt, Choi, Jaewon, Zhong, Ruidan, Schneeloch, John A., Gu, Genda D., Zhou, Ke-Jin, Brookes, Nicholas B., Kemper, Alexander F., Minola, Matteo, Boschini, Fabio, Frano, Alex, Gozar, Adrian, Neto, Eduardo H. da Silva
Recent improvements in the energy resolution of resonant inelastic x-ray scattering experiments (RIXS) at the Cu-L$_3$ edge have enabled the study of lattice, spin, and charge excitations. Here, we report on the detection of a low intensity signal at
Externí odkaz:
http://arxiv.org/abs/2309.15989
Autor:
Ragone, Michael, Bakalov, Bojko N., Sauvage, Frédéric, Kemper, Alexander F., Marrero, Carlos Ortiz, Larocca, Martin, Cerezo, M.
Publikováno v:
Nature Communications 15, 7172 (2024)
Variational quantum computing schemes train a loss function by sending an initial state through a parametrized quantum circuit, and measuring the expectation value of some operator. Despite their promise, the trainability of these algorithms is hinde
Externí odkaz:
http://arxiv.org/abs/2309.09342
Publikováno v:
npj Quantum Information 10, 110 (2024)
Much is understood about 1-dimensional spin chains in terms of entanglement properties, physical phases, and integrability. However, the Lie algebraic properties of the Hamiltonians describing these systems remain largely unexplored. In this work, we
Externí odkaz:
http://arxiv.org/abs/2309.05690
Response functions of quantum systems, such as electron Green's functions, magnetic, or charge susceptibilities, describe the response of a system to an external perturbation. They are the central objects of interest in field theories and quantum com
Externí odkaz:
http://arxiv.org/abs/2309.02566
Publikováno v:
Electron. Struct. 5 045007 (2023)
A typical task for classical and quantum computing in chemistry is finding a potential energy surface (PES) along a reaction coordinate, which involves solving the quantum chemistry problem for many points along the reaction path. Developing algorith
Externí odkaz:
http://arxiv.org/abs/2305.00060
Response functions are a fundamental aspect of physics; they represent the link between experimental observations and the underlying quantum many-body state. However, this link is often under-appreciated, as the Lehmann formalism for obtaining respon
Externí odkaz:
http://arxiv.org/abs/2302.10219