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Preprints
Compilation of documents that synthesize an original research about a concret topic in a study area with the aim of report on the state of the research. They help to discover new idees and concepts and to shape research lines specially in the social sciences and humanities areas. For example: the working papers of Mathematical Research Center.
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2023-07-25
03:56
25 p, 742.2 KB Stability results for a hierarchical size-structured population model with distributed delay / Hu, Dandan (China University of Geosciences) ; Farkas, József Z. (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Huang, Gang (China University of Geosciences)
In this paper we investigate a structured population model with distributed delay. Our model incorporates two different types of nonlinearities. Specifically we assume that individual growth and mortality are affected by scramble competition, while fertility is affected by contest competition. [...]
2023 - 10.48550/arXiv.2307.08342  
Detailed record - Creative Commons
2023-06-30
16:50
144 p, 5.7 MB Onomástica china de la 'Historia de las cosas más notables, ritos y costumbres del gran Reyno de la China', de Juan González de Mendoza / Ramírez Bellerín, Laureano (Universitat Autònoma de Barcelona)
'La Historia de las cosas más notables, ritos y costumbres del gran Reyno de la China', de fray Juan González de Mendoza, tuvo gran difusión en la Europa de la Edad Moderna y marcó, gracias a su popularidad, un punto de inflexión en los incipientes conocimientos que por entonces se tenían del remoto país oriental. [...]
2023  
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2023-05-22
07:47
4 p, 258.5 KB Popper's test of quantum mechanics and two-photon "ghost" diffraction / Bramon Planas, Albert (Universitat Autònoma de Barcelona. Departament de Física) ; Escribano, Rafel (Institut de Física d'Altes Energies)
A test on quantum mechanics proposed long ago by Karl Popper is reconsidered with further detail and new insight. An ambiguity in the proposal, which turns out to be essential in order to make the test conclusive, is identified and taken into account for the first time. [...]
2005  
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2023-05-22
07:47
32 p, 1.1 MB Radiative corrections to the τ−→(P1P2)−ντ (P1,2=π,K) decays / Escribano, Rafel (Universitat Autònoma de Barcelona. Departament de Física) ; Miranda Hernández, Jesús Alejandro (Institut de Física d'Altes Energies) ; Roig, Pablo (Instituto Politécnico Nacional. Centro de Investigación y de Estudios Avanzados. Departamento de Física)
The radiative corrections to the τ−→(P1P2)−ντ (P1,2=π,K) decays are calculated for the first time. The structure-dependent contributions are obtained using Resonance Chiral Theory. Our results, whose uncertainty is dominated by the model-independent corrections, enable precise tests of CKM unitarity, lepton flavor universality, and non-standard interactions.
2023 - 10.48550/arXiv.2303.01362  
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2023-05-22
07:47
18 p, 1.0 MB A combined study of hadronic D+ → K−π+π+ and D+s → K+K+π− decays by means of the analysis of semileptonic D+ → K−π+l+νl decays / Escribano, Rafel (Universitat Autònoma de Barcelona. Departament de Física) ; Masjuan, Pere (Universitat Autònoma de Barcelona. Departament de Física) ; Sánchez-Puertas, Pablo (Institut de Física d'Altes Energies)
We perform a combined study of the two hadronic decays D+→K−π+π+ and D+s→K+K+π− using a detailed analysis of the semileptonic decays D+→K−π+ℓ+νℓ (ℓ=e,μ) thanks to the high-statistics D+→K−π+e+νe dataset provided by the BESIII Collaboration. [...]
2023  
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2023-05-11
15:13
10 p, 2.6 MB Ultrafast electronic heat dissipation through surface-to-bulk Coulomb coupling in quantum materials / Principi, Alessandro (University of Manchester. Department of Physics and Astronomy) ; Tielrooij, Klaas-Jan (Institut Català de Nanociència i Nanotecnologia)
The timescale of electronic cooling is an important parameter controlling the performance of devices based on quantum materials for optoelectronic, thermoelectric and thermal management applications. [...]
2022 - 10.48550/arXiv.2206.09119  
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2023-05-11
15:13
16 p, 7.9 MB Merging of superfluid Helium nanodroplets with vortices / Escartín Esteban, José María (Institut Català de Nanociència i Nanotecnologia) ; Ancilotto, Francesco (Università di Padova. Dipartimento di Fisica e Astronomia "Galileo Galilei.) ; Barranco, Manuel (Universitat de Barcelona. Departament de Física Quàntica i Astrofísica) ; Pi, Marti (Universitat de Barcelona. Institut de Nanociència i Nanotecnologia)
Within Density Functional Theory, we have investigated the coalescence dynamics of two superfluid helium nanodroplets hosting vortex lines in different relative orientations, which are drawn towards each other by the Van der Waals mutual attraction. [...]
2021 - 10.48550/arXiv.2110.10612  
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2023-05-11
15:13
12 p, 1.0 MB Heat dissipation in few-layer MoS2 and MoS2/hBN heterostructure / Arrighi, Aloïs (Institut Català de Nanociència i Nanotecnologia) ; Del Corro, Elena (Institut Català de Nanociència i Nanotecnologia) ; Navarro Urrios, Daniel (Universitat Autònoma de Barcelona. Departament de Física) ; Costache, Marius Vasile (Institut Català de Nanociència i Nanotecnologia) ; Sierra, Juan F. (Institut Català de Nanociència i Nanotecnologia) ; Watanabe, Kenji (National Institute for Material Science. Advanced Materials Laboratory (Tsukuba, Japó)) ; Taniguchi, Takashi (National Institute for Material Science. Advanced Materials Laboratory (Tsukuba, Japó)) ; Garrido, Jose (Institut Català de Nanociència i Nanotecnologia) ; Valenzuela, Sergio O. (Institut Català de Nanociència i Nanotecnologia) ; Sotomayor Torres, Clivia M. (Institut Català de Nanociència i Nanotecnologia) ; Sledzinska, Marianna (Institut Català de Nanociència i Nanotecnologia)
State-of-the-art fabrication and characterization techniques have been employed to measure the thermal conductivity of suspended, single-crystalline MoS2 and MoS2/hBN heterostructures. Two-laser Raman scattering thermometry was used combined with real time measurements of the absorbed laser power, which allowed us to determine the thermal conductivities without any assumptions. [...]
2021 - 10.48550/arXiv.2107.06717  
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2023-05-11
15:13
12 p, 12.8 MB Engineering nanoscale hypersonic phonon transport / Florez, Omar (Universitat Autònoma de Barcelona. Departament de Física) ; Arregui Bravo, Guillermo (Institut Català de Nanociència i Nanotecnologia) ; Albrechtsen, M. (Technical University of Denmark. Department of Photonics Engineering) ; Ng, Ryan C. (Institut Català de Nanociència i Nanotecnologia) ; Gomis-Bresco, Jordi (Institut Català de Nanociència i Nanotecnologia) ; Stobbe, Søren (Technical University of Denmark. Department of Photonics Engineering) ; Sotomayor Torres, Clivia M (Institut Català de Nanociència i Nanotecnologia) ; García Fernández, Pedro David (Institut Català de Nanociència i Nanotecnologia)
Controlling the vibrations in solids is crucial to tailor their mechanical properties and their interaction with light. Thermal vibrations represent a source of noise and dephasing for many physical processes at the quantum level. [...]
2022 - 10.48550/arXiv.2202.02166  
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2023-05-11
15:13
8 p, 1017.8 KB Full orbital decomposition of Yu-Shiba-Rusinov states based on first principles / Saunderson, Tom G. (University of Bristol. HH Wills Physics Laboratory) ; Annett, James (University of Bristol. HH Wills Physics Laboratory) ; Csire, Gabor (Institut Català de Nanociència i Nanotecnologia) ; Gradhand, Martin (University of Bristol. HH Wills Physics Laboratory)
We have implemented the Bogoliubov-de Gennes (BdG) equation in a screened Korringa-Kohn- Rostoker (KKR) method for solving, self-consistently, the superconducting state for 3d crystals including substitutional impurities. [...]
2021 - 10.48550/arXiv.2107.00237  
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