August 2022 - Instituto De Física Fundamental

The role of highly vibrationally excited H-2 initiating the nitrogen chemistry Quantum study and 3 sigma – detection of NH emission in the Orion Bar PDR

Marcelo Castellanos2023-02-21T13:36:26+01:00Tags: Astronomy & Astrophysics. |

Authors: Goicoechea, Javier R.; Roncero, Octavio Journal: ASTRONOMY & ASTROPHYSICS Publication date: 2022/08/31 DOI: 10.1051/0004-6361/202243884 Abstract: The formation of hydrides by gas-phase reactions between H-2 and a heavy element atom is a very selective process. Reactions with ground-state neutral carbon, oxygen, nitrogen, and sulfur atoms are very endoergic and have high energy barriers because the [...]

Spin-orbit transitions in the N+(P-3 (JA))+H2 -> NH+(X-2 Pi, (4)Sigma(-)) + H(S-2) reaction, using adiabatic and mixed quantum-adiabatic statistical approaches

Marcelo Castellanos2023-02-21T13:36:08+01:00Tags: Atomic, Chemistry, Molecular & Chemical. , Physical; Physics|

Authors: Gomez-Carrasco, Susana; Felix-Gonzalez, Daniel; Aguado, Alfredo; Roncero, Octavio Journal: JOURNAL OF CHEMICAL PHYSICS Publication date: 2022/08/28 DOI: 10.1063/5.0102376 Abstract: The cross section and rate constants for the title reaction are calculated for all the spin-orbit states of N+(P-3 (JA))using two statistical approaches, one purely adiabatic and the other one mixing quantum capture for the [...]

Extremely high spectral resolution measurements of the 450 mu m atmospheric window at Chajnantor with APEX

Marcelo Castellanos2023-02-21T13:36:26+01:00Tags: Astronomy & Astrophysics. |

Authors: Pardo, J. R.; De Breuck, C.; Muders, D.; Gonzalez, J.; Montenegro-Montes, F. M.; Perez-Beaupuits, J. P.; Cernicharo, J.; Prigent, C.; Serabyn, E.; Mroczkowski, T.; Phillips, N. Journal: ASTRONOMY & ASTROPHYSICS Publication date: 2022/08/24 DOI: 10.1051/0004-6361/202243409 Abstract: Ground-based telescopes observing at millimeter (mm) and submillimeter (submm) wavelengths have to deal with a line-rich and highly [...]

Tuning Long-Range Fermion-Mediated Interactions in Cold-Atom Quantum Simulators

Marcelo Castellanos2023-02-21T13:36:09+01:00Tags: Multidisciplinary. , Physics|

Authors: Arguello-Luengo, Javier; Gonzalez-Tudela, Alejandro; Gonzalez-Cuadra, Daniel Journal: PHYSICAL REVIEW LETTERS Publication date: 2022/08/17 DOI: 10.1103/PhysRevLett.129.083401 Abstract: Engineering long-range interactions in cold-atom quantum simulators can lead to exotic quantum many -body behavior. Fermionic atoms in ultracold atomic mixtures can act as mediators, giving rise to long-range Ruderman-Kittel-Kasuya-Yosida-type interactions characterized by the dimensionality and density of [...]

Variational Determination of Multiqubit Geometrical Entanglement in Noisy Intermediate-Scale Quantum Computers

Marcelo Castellanos2023-02-21T13:36:27+01:00Tags: Applied. , Physics|

Authors: Munoz-Moller, A. D.; Pereira, L.; Zambrano, L.; Cortes-Vega, J.; Delgado, A. Journal: PHYSICAL REVIEW APPLIED Publication date: 2022/08/17 DOI: 10.1103/PhysRevApplied.18.024048 Abstract: Current noise levels in physical realizations of qubits and quantum operations limit the applicability of conventional methods to characterize entanglement. In this adverse scenario, we follow a quantum variational approach to estimate the [...]

Multiqudit interactions in molecular spins

Marcelo Castellanos2023-02-21T13:36:27+01:00Tags: Atomic, Molecular & Chemical. , Optics; Physics|

Authors: Gomez-Leon, Alvaro Journal: PHYSICAL REVIEW A Publication date: 2022/08/15 DOI: 10.1103/PhysRevA.106.022609 Abstract: We study photon-mediated interactions between molecular spin qudits in the dispersive regime of operation. We derive from a microscopic model the effective interaction between molecular spins, including their crystal field anisotropy (i.e., the presence of nonlinear spin terms) and their multilevel structure. [...]

Observation of Transient Anions That Do Not Decay through Dissociative Electron Attachment: New Pathways for Radiosensitization

Marcelo Castellanos2023-02-21T13:36:28+01:00Tags: Atomic, Chemistry, Molecular & Chemical. , Multidisciplinary; Physics, Physical; Nanoscience & Nanotechnology; Materials Science|

Authors: Lozano, Ana I.; Kossoski, Fabris; Blanco, Francisco; Limao-Vieira, Paulo; Varella, Marcio T. do N.; Garcia, Gustavo Journal: JOURNAL OF PHYSICAL CHEMISTRY LETTERS Publication date: 2022/08/04 DOI: 10.1021/acs.jpclett.2c01704 Abstract: Low-energy electrons (LEEs) can very efficiently induce bond breaking via dissociative electron attachment (DEA). While DEA is ubiquitous, the importance of other reactions initiated by LEEs [...]

Stochastic Bohmian and Scaled Trajectories

Marcelo Castellanos2023-02-21T13:36:29+01:00Tags: Multidisciplinary. , Physics|

Authors: Mousavi, S. V.; Miret-Artes, S. Journal: FOUNDATIONS OF PHYSICS Publication date: 2022/08/01 DOI: 10.1007/s10701-022-00598-2 Abstract: In this review we deal with open (dissipative and stochastic) quantum systems within the Bohmian mechanics framework which has the advantage to provide a clear picture of quantum phenomena in terms of trajectories, originally in configuration space. The gradual [...]

Sensing the ortho Positions in C6Cl6 and C6H4Cl2 from Cl-2(-) Formation upon Molecular Reduction

Marcelo Castellanos2023-02-21T13:36:29+01:00Tags: Biochemistry & Molecular Biology; Chemistry, Multidisciplinary. |

Authors: Kumar, Sarvesh; Romero, Jose; Probst, Michael; Maihom, Thana; Garcia, Gustavo; Limao-Vieira, Paulo Journal: MOLECULES Publication date: 2022/08/01 DOI: 10.3390/molecules27154820 Abstract: The geometrical effect of chlorine atom positions in polyatomic molecules after capturing a low-energy electron is shown to be a prevalent mechanism yielding Cl-2(-). In this work, we investigated hexachlorobenzene reduction in electron transfer [...]

Vibrational deactivation in O(P-3) + N-2 collisions: from an old problem towards its solution

Marcelo Castellanos2023-02-21T13:36:28+01:00Tags: Fluids & Plasmas. , Physics|

Authors: Hong, Qizhen; Bartolomei, Massimiliano; Pirani, Fernando; Esposito, Fabrizio; Sun, Quanhua; Coletti, Cecilia Journal: PLASMA SOURCES SCIENCE & TECHNOLOGY Publication date: 2022/08/01 DOI: 10.1088/1361-6595/ac86f3 Abstract: In a recent communication [2021 Phys. Chem. Chem. Phys. 23 15475-79] we showed that the correct modelling of vibrational quenching events in O + N-2(v) collisions, a fundamental process in [...]