Computational molecular dynamics simulations of cationic alkali dimers solvated in He clusters: the Li2+ case

2024-03-27T13:58:35+01:00Tags: , , |

Authors: Yanes-Rodriguez, Raquel; Rodriguez-Segundo, Raul; Villarreal, Pablo; Prosmiti, Rita Journal: EUROPEAN PHYSICAL JOURNAL D Publication date: 2023/06/01 DOI: 10.1140/epjd/s10053-023-00691-9 Abstract: The structures and energetics of Li-2(+) -doped He clusters have been determined by means of evolutionary programming optimizations and classical molecular dynamics simulations. The underlying interactions in the HeNLi+ 2 complexes are described by sum-of-potentials [...]

The electronic structure of 2(5H)-thiophenone investigated by vacuum ultraviolet synchrotron radiation and theoretical calculations

2024-03-27T13:58:00+01:00Tags: , , |

Authors: Kumar, S.; Duflot, D.; Jones, N. C.; Hoffmann, S. V.; Garcia, G.; Limao-Vieira, P. Journal: EUROPEAN PHYSICAL JOURNAL D Publication date: 2023/11/01 DOI: 10.1140/epjd/s10053-023-00771-w Abstract: The electronic state spectroscopy of 2(5H)-thiophenone, C4H4OS, has been investigated by high-resolution vacuum ultraviolet photoabsorption in the 3.76-10.69 eV energy range using synchrotron radiation, together with novel quantum chemical [...]

Inelastic N2+H2 collisions and quantum-classical rate coefficients: large datasets and machine learning predictions

2024-03-27T13:57:58+01:00Tags: , , |

Authors: Hong, Qizhen; Storchi, Loriano; Bartolomei, Massimiliano; Pirani, Fernando; Sun, Quanhua; Coletti, Cecilia Journal: EUROPEAN PHYSICAL JOURNAL D Publication date: 2023/07/01 DOI: 10.1140/epjd/s10053-023-00688-4 Abstract: Rate coefficients for vibrational energy transfer are calculated for collisions between molecular nitrogen and hydrogen in a wide range of temperature and of initial vibrational states (v = 40 for N-2 [...]

Stochastic optimization algorithms for quantum applications

2024-03-27T13:57:44+01:00Tags: , , |

Authors: Gidi, J.; Candia, B.; Munoz-Moller, A. D.; Rojas, A.; Pereira, L.; Munoz, M.; Zambrano, L.; Delgado, A. Journal: PHYSICAL REVIEW A Publication date: 2023/09/08 DOI: 10.1103/PhysRevA.108.032409 Abstract: Hybrid classical quantum optimization methods have become an important tool for efficiently solving problems in the current generation of noisy intermediate-scale quantum computers. These methods use an [...]

Absolute partial and total ionization cross sections for electron impact ionization of 2-butanol

2024-03-27T13:57:04+01:00Tags: , , |

Authors: Amorim, R. A. A.; Oliveira, C. B.; Oliveira Junior, O. L.; Diniz, A. C.; Jones, D. B.; Rosado, J.; Blanco, F.; Garcia, G.; Brunger, M. J.; Lopes, M. C. A. Journal: EUROPEAN PHYSICAL JOURNAL D Publication date: 2023/09/01 DOI: 10.1140/epjd/s10053-023-00742-1 Abstract: Partial ionization cross section (PICS) measurements of the cations created through electron impact [...]

Coupled-oscillator model to analyze the interaction between a quartz resonator and trapped ions

2024-03-27T13:57:02+01:00Tags: , , |

Authors: Altozano, E.; Berrocal, J.; Lohse, S.; Dominguez, F.; Block, M.; Garcia-Ripoll, J. J.; Rodriguez, D. Journal: PHYSICAL REVIEW A Publication date: 2023/05/30 DOI: 10.1103/PhysRevA.107.053116 Abstract: The novel application of a piezoelectric quartz resonator for the detection of trapped ions has enabled the observation of the quartz-ions interaction under nonequilibrium conditions, opening new perspectives for [...]

Optical isolators based on nonreciprocal four-wave mixing

2023-02-21T13:39:30+01:00Tags: , , |

Authors: Muñoz de las Heras, A.; Carusotto, I. Journal: PHYSICAL REVIEW A Publication date: 2022/12/29 DOI: 10.1103/PhysRevA.106.063523 Abstract: In this work we propose and theoretically characterize optical isolators consisting of an all-dielectric and nonmagnetic resonator featuring an intensity-dependent refractive index and a strong coherent field propagating in a single direction. Such devices can be straightforwardly [...]

Quantum Fourier analysis for multivariate functions and applications to a class of Schrodinger-type partial differential equations

2023-02-21T13:37:18+01:00Tags: , , |

Authors: Garcia-Molina, Paula; Rodriguez-Mediavilla, Javier; Jose Garcia-Ripoll, Juan Journal: PHYSICAL REVIEW A Publication date: 2022/01/31 DOI: 10.1103/PhysRevA.105.012433 Abstract: In this work we develop a highly efficient representation of functions and differential operators based on Fourier analysis. Using this representation, we create a variational hybrid quantum algorithm to solve static, Schrodinger-type, Hamiltonian partial differential equations (PDEs), [...]

Non-Gaussian entanglement swapping between three-mode spontaneous parametric down-conversion and three qubits

2023-02-21T13:37:15+01:00Tags: , , |

Authors: Casado, A. Agusti; Sabin, C. Journal: PHYSICAL REVIEW A Publication date: 2022/02/03 DOI: 10.1103/PhysRevA.105.022401 Abstract: In this work we study the production and swapping of non-Gaussian multipartite entanglement in a setup containing a parametric amplifier which generates three photons in different modes coupled to three qubits. We prove that the entanglement generated in this [...]

Out-of-time-order correlator in the quantum Rabi model

2023-02-21T13:37:02+01:00Tags: , , |

Authors: Kirkova, Aleksandrina, V; Porras, Diego; Ivanov, Peter A. Journal: PHYSICAL REVIEW A Publication date: 2022/03/25 DOI: 10.1103/PhysRevA.105.032444 Abstract: We investigate signatures of chaos and equilibration in the quantum Rabi model, which exhibits a quantum phase transition when the ratio of the atomic level-splitting to bosonic frequency grows to infinity. We show that the out-of-time-order [...]

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