Avoiding barren plateaus in the variational determination of geometric entanglement

2025-04-28T11:14:36+02:00Tags: , |

Authors: Zambrano, L.; Munoz-Moller, A. D.; Munoz, M.; Pereira, L.; Delgado, A. Journal: QUANTUM SCIENCE AND TECHNOLOGY Publication date: 2024/03/28 DOI: 10.1088/2058-9565/ad2a16 Abstract: The barren plateau (BP) phenomenon is one of the main obstacles to implementing variational quantum algorithms in the current generation of quantum processors. Here, we introduce a method capable of avoiding the [...]

AutoQML: Automatic generation and training of robust quantum-inspired classifiers by using evolutionary algorithms on grayscale images

2025-04-28T11:12:59+02:00Tags: , , |

Authors: Altares-Lopez, Sergio; Garcia-Ripoll, Juan Jose; Ribeiro, Angela Journal: EXPERT SYSTEMS WITH APPLICATIONS Publication date: 2024/03/25 DOI: 10.1016/j.eswa.2023.122984 Abstract: A new hybrid system is proposed for automatically generating and training quantum-inspired classifiers on grayscale images by using multiobjective genetic algorithms. It is defined a dynamic fitness function to obtain the smallest circuit complexity and highest [...]

Photonic quantum metrology with variational quantum optical nonlinearities

2025-04-28T11:13:20+02:00Tags: , |

Authors: de las Heras, A. Munoz; Tabares, C.; Schneider, J. T.; Tagliacozzo, L.; Porras, D.; Gonzalez-Tudela, A. Journal: PHYSICAL REVIEW RESEARCH Publication date: 2024/03/19 DOI: 10.1103/PhysRevResearch.6.013299 Abstract: Photonic quantum metrology harnesses quantum states of light, such as NOON or twin-Fock states, to measure unknown parameters beyond classical precision limits. Current protocols suffer from two severe [...]

Hyperfine excitation of NH and ND by molecular hydrogen Rate coefficients and astrophysical modeling

2025-04-28T11:13:48+02:00Tags: |

Authors: Jankowiak, Paul Pirlot; Lique, Francois; Goicoechea, Javier R. Journal: ASTRONOMY & ASTROPHYSICS Publication date: 2024/03/15 DOI: 10.1051/0004-6361/202348865 Abstract: The NH and ND radicals are of key importance in the comprehension of nitrogen chemistry and the enhancement of deuterated molecules in the interstellar medium. Observations by space telescopes yield spectra that can resolve the fine [...]

Seminario IFF #1/2024 – Prof. Massimo Mella (22/03/2024)

2024-03-18T13:06:15+01:00Tags: , , , , |

¡Bienvenidos a un nuevo ciclo de seminarios del IFF en 2024! El primer seminario IFF será impartido por el profesor Massimo Mella, del Dipartimento di Scienza ed Alta Tecnologia, Università degli Studi dell’Insubria (Como, Italia). Su charla lleva por título "From isolated gas-phase hydrogen molecules to selective adsorption for isotopic separation" o cómo se [...]

Exploring Quantum Annealing Architectures: A Spin Glass Perspective

2025-04-28T11:13:49+02:00Tags: |

Authors: Jauma, Gabriel; Garcia-Ripoll, Juan Jose; Pino, Manuel Journal: ADVANCED QUANTUM TECHNOLOGIES Publication date: 2024/03/14 DOI: 10.1002/qute.202300245 Abstract: This work analyzes the spin-glass transition across various Ising models relevant to quantum annealers. By employing the parallel tempering method, the location of the spin-glass phase transition is extrapolated from the pseudo-critical temperature of finite-sized systems. The [...]

Numerical simulation of large-scale nonlinear open quantum mechanics

2025-04-28T11:14:20+02:00Tags: , |

Authors: Roda-Llordes, M.; Candoli, D.; Grochowski, P. T.; Riera-Campeny, A.; Agrenius, T.; Garcia-Ripoll, J. J.; Gonzalez-Ballestero, C.; Romero-Isart, O. Journal: PHYSICAL REVIEW RESEARCH Publication date: 2024/03/08 DOI: 10.1103/PhysRevResearch.6.013262 Abstract: We introduce a method to solve nonlinear open quantum dynamics of a particle in situations where its state undergoes significant expansion in phase space while generating [...]

Experimental and theoretical assessment of the enhanced hydrogen adsorption on polycyclic aromatic hydrocarbons upon decoration with alkali metals

2025-04-28T11:14:18+02:00Tags: , |

Authors: Reider, Anna Maria; Kollotzek, Siegfried; Scheier, Paul; Calvo, Florent; Yurtsever, Ersin; Pirani, Fernando; Bartolomei, Massimiliano; Hernandez, Marta I.; Gonzalez-Lezana, Tomas; Campos-Martinez, Jose Journal: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY Publication date: 2024/03/08 DOI: 10.1016/j.ijhydene.2024.01.244 Abstract: Hydrogen storage by physisorption on carbon-based materials is limited by comparatively low adsorption energies. However, decoration of the carbon substrate [...]

Converting Long-Range Entanglement into Mixture: Tensor-Network Approach to Local Equilibration

2025-04-28T11:13:31+02:00Tags: , |

Authors: Frias-Perez, Miguel; Tagliacozzo, Luca; Banuls, Mari Carmen Journal: PHYSICAL REVIEW LETTERS Publication date: 2024/03/08 DOI: 10.1103/PhysRevLett.132.100402 Abstract: In the out-of-equilibrium evolution induced by a quench, fast degrees of freedom generate long-range entanglement that is hard to encode with standard tensor networks. However, local observables only sense such long-range correlations through their contribution to the [...]

Peeling back the layers of extinction of dusty galaxies in the era of JWST: modelling joint NIRSpec plus MIRI spectra at rest-frame 1.5-28 ?m

2025-04-28T11:13:25+02:00Tags: |

Authors: Donnan, F. R.; Garcia-Bernete, I; Rigopoulou, D.; Pereira-Santaella, M.; Roche, P. F.; Alonso-Herrero, A. Journal: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Publication date: 2024/03/06 DOI: 10.1093/mnras/stae612 Abstract: We present an analysis of the combined NIRSpec and MIRI spectra of dusty galaxies between 1.5 and 28 mu m rest-frame by implementing a differential extinction [...]

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