July 2024 - Instituto De Física Fundamental

Detecting Entanglement from Macroscopic Measurements of the Electric Field and Its Fluctuations

Marcelo Castellanos2025-04-28T11:14:21+02:00Tags: Multidisciplinary. , Physics|

Authors: Rosario, Pedro; Santos, Alan C.; Piovella, Nicola; Kaiser, Robin; Cidrim, Andre; Bachelard, Romain Journal: PHYSICAL REVIEW LETTERS Publication date: 2024/07/31 DOI: 10.1103/PhysRevLett.133.050203 Abstract: To address the outstanding task of detecting entanglement in large quantum systems, entanglement witnesses have emerged, addressing the separable nature of a state. Yet optimizing witnesses, or accessing them experimentally, often [...]

Discovery of the interstellar cyanoacetylene radical cation HC3N+

Marcelo Castellanos2025-04-28T11:13:07+02:00Tags: Astronomy & Astrophysics. |

Authors: Cabezas, C.; Agundez, M.; Endo, Y.; Tercero, B.; Marcelino, N.; de Vicente, P.; Cernicharo, J. Journal: ASTRONOMY & ASTROPHYSICS Publication date: 2024/07/30 DOI: 10.1051/0004-6361/202451081 Abstract: We report the first identification in space of HC3N+, the simplest member of the family of cyanopolyyne cations. Three rotational transitions with half-integer quantum numbers from J = 7/2 [...]

Multiline observations of hydrogen, helium, and carbon radio-recombination lines toward Orion A: A detailed dynamical study and direct determination of physical conditions

Marcelo Castellanos2025-04-28T11:14:06+02:00Tags: Astronomy & Astrophysics. |

Authors: Pabst, C. H. M.; Goicoechea, J. R.; Cuadrado, S.; Salas, P.; Tielens, A. G. G. M.; Marcelino, N. Journal: ASTRONOMY & ASTROPHYSICS Publication date: 2024/07/29 DOI: 10.1051/0004-6361/202347574 Abstract: We present a study of hydrogen, helium, and carbon millimeter-wave radio-recombination lines (RRLs) toward 10 representative positions throughout the Orion Nebula complex, using the Yebes 40 [...]

The role of intersystem crossing in the reactive collision of S+(4S) with H2

Marcelo Castellanos2025-04-28T11:14:37+02:00Tags: Atomic, Chemistry, Molecular & Chemical. , Physical; Physics|

Authors: Zanchet, Alexandre; Roncero, Octavio; Karabulut, Ezman; Solem, Nicolas; Romanzin, Claire; Thissen, Roland; Alcaraz, Christian Journal: JOURNAL OF CHEMICAL PHYSICS Publication date: 2024/07/28 DOI: 10.1063/5.0214447 Abstract: We report a study on the reactive collision of S+(S-4) with H-2, HD, and D-2 combining guided ion beam experiments and quantum-mechanical calculations. It is found that the reactive [...]

Low-lying Negative Ion States Probed in Potassium – Ethanol Collisions

Marcelo Castellanos2025-04-28T11:13:55+02:00Tags: Atomic, Chemistry, Molecular & Chemical. , Physical; Physics|

Authors: Lozano, Ana Isabel; Kumar, Sarvesh; Pereira, Pedro J. S.; Kerkeni, Boutheina; Garcia, Gustavo; Limao-Vieira, Paulo Journal: CHEMPHYSCHEM Publication date: 2024/07/15 DOI: 10.1002/cphc.202400314 Abstract: Dissociative electron transfer in collisions between neutral potassium atoms and neutral ethanol molecules yields mainly OH-, followed by C2H5O-, O-, CH3- and CH2-. The dynamics of negative ions have been investigated [...]

Cyano-Polycyclic Aromatic Hydrocarbon Interstellar Candidates: Laboratory Identification, Equilibrium Structure and Astronomical Search of Cyanobiphenylene

Marcelo Castellanos2025-04-28T11:13:07+02:00Tags: Atomic, Chemistry, Molecular & Chemical. , Multidisciplinary; Physics, Physical; Nanoscience & Nanotechnology; Materials Science|

Authors: Cabezas, Carlos; Janeiro, Jesus; Perez, Dolores; Li, Wenqin; Agundez, Marcelino; Steber, Amanda L.; Guitian, Enrique; Demaison, Jean; Perez, Cristobal; Cernicharo, Jose; Lesarri, Alberto Journal: JOURNAL OF PHYSICAL CHEMISTRY LETTERS Publication date: 2024/07/12 DOI: 10.1021/acs.jpclett.4c01500 Abstract: The interplay between laboratory rotational spectroscopy and radio astronomical observations provides the most effective procedure for identifying molecules in [...]

In-depth exploration of catalytic sites on amorphous solid water: I. The astrosynthesis of aminomethanol

Marcelo Castellanos2025-04-28T11:13:05+02:00Tags: Atomic, Chemistry, Molecular & Chemical. , Physical; Physics|

Authors: Bovolenta, Giulia M.; Silva-Vera, Gabriela; Bovino, Stefano; Molpeceres, German; Kaestner, Johannes; Vogt-Geisse, Stefan Journal: PHYSICAL CHEMISTRY CHEMICAL PHYSICS Publication date: 2024/07/10 DOI: 10.1039/d4cp01865f Abstract: Chemical processes taking place on ice-grain mantles are pivotal to the complex chemistry of interstellar environments. In this study, we conducted a comprehensive analysis of the catalytic effects of an [...]

Polycyclic aromatic hydrocarbon emission in galaxies as seen with JWST

Marcelo Castellanos2025-04-28T11:14:18+02:00Tags: Astronomy & Astrophysics. |

Authors: Rigopoulou, D.; Donnan, F. R.; Garcia-Bernete, I; Pereira-Santaella, M.; Alonso-Herrero, A.; Davies, R.; Hunt, L. K.; Roche, P. F.; Shimizu, T. Journal: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY Publication date: 2024/07/09 DOI: 10.1093/mnras/stae1535 Abstract: We present a systematic study of mid-infrared spectra of galaxies including star-forming galaxies and active galactic nuclei observed with [...]

Multiline study of the radial extent of SiO, CS, and SiS in asymptotic giant branch envelopes

Marcelo Castellanos2025-04-28T11:13:57+02:00Tags: Astronomy & Astrophysics. |

Authors: Massalkhi, S.; Agundez, M.; Fonfria, J. P.; Pardo, J. R.; Velilla-Prieto, L.; Cernicharo, J. Journal: ASTRONOMY & ASTROPHYSICS Publication date: 2024/07/09 DOI: 10.1051/0004-6361/202450188 Abstract: Circumstellar envelopes around asymptotic giant branch (AGB) stars contain a rich diversity of molecules, whose spatial distribution is regulated by different chemical and physical processes. In the outer circumstellar layers, [...]

Static and spherically symmetric vacuum spacetimes with non-expanding principal null directions in f(R) gravity

Marcelo Castellanos2025-04-28T11:13:39+02:00Tags: Particles & Fields. , Physics|

Authors: Guilabert, Alberto; Calzada, Pelayo V.; Bargueno, Pedro; Miret-Artes, Salvador Journal: EUROPEAN PHYSICAL JOURNAL C Publication date: 2024/07/09 DOI: 10.1140/epjc/s10052-024-13063-3 Abstract: In this work we characterize all the static and spherically symmetric vacuum solutions in f(R) gravity when the principal null directions of the Weyl tensor are non-expanding. In contrast to General Relativity, we show [...]