Rate coefficients for H-2:H-2 inelastic collisions in the ground vibrational state from 10 to 1000 K

2021-10-27T10:46:50+02:00Tags: |

Authors: Hernandez, M., I; Tejeda, G.; Fernandez, J. M.; Montero, S. Journal: ASTRONOMY & ASTROPHYSICS Publication date: 2021/03/26 DOI: 10.1051/0004-6361/202039790 Abstract: Aims. In this work, we present a pruned set of state-to-state rate coefficients (STS rates) for inelastic H-2:H-2 collisions in the thermal range from 10 to 1000 K. The set includes all relevant rates [...]

Work statistics and symmetry breaking in an excited-state quantum phase transition

2021-10-27T10:46:50+02:00Tags: , , |

Authors: Mzaouali, Zakaria; Puebla, Ricardo; Goold, John; El Baz, Morad; Campbell, Steve Journal: PHYSICAL REVIEW E Publication date: 2021/03/25 DOI: 10.1103/PhysRevE.103.032145 Abstract: We examine how the presence of an excited-state quantum phase transition manifests in the dynamics of a many-body system subject to a sudden quench. Focusing on the Lipkin-Meshkov-Glick model initialized in the ground [...]

Electron-Transfer-Induced Side-Chain Cleavage in Tryptophan Facilitated through Potassium-Induced Transition-State Stabilization in the Gas Phase

2021-10-27T10:46:50+02:00Tags: , , , |

Authors: da Silva, Filipe Ferreira; Cunha, Tiago; Rebelo, Andre; Gil, Adria; Calhorda, Maria Jose; Garcia, Gustavo; Ingolfsson, Oddur; Limao-Vieira, Paulo Journal: JOURNAL OF PHYSICAL CHEMISTRY A Publication date: 2021/03/25 DOI: 10.1021/acs.jpca.1c00690 Abstract: Fragmentation of transient negative ions of tryptophan molecules formed through electron transfer in collisions with potassium atoms is presented for the first time [...]

Gaussian phase sensitivity of boson-sampling-inspired strategies

2021-10-27T10:46:50+02:00Tags: , , |

Authors: Valido, Antonio A.; Jose Garcia-Ripoll, Juan Journal: PHYSICAL REVIEW A Publication date: 2021/03/24 DOI: 10.1103/PhysRevA.103.032613 Abstract: In this paper we study the phase sensitivity of generic linear interferometric schemes using Gaussian resources and measurements. Our formalism is based on the Fisher information. This allows us to separate the contributions of the measurement scheme, the [...]

Discovery of the propargyl radical (CH2CCH) in TMC-1: One of the most abundant radicals ever found and a key species for cyclization to benzene in cold dark clouds

2021-10-27T10:46:50+02:00Tags: |

Authors: Agundez, M.; Cabezas, C.; Tercero, B.; Marcelino, N.; Gallego, J. D.; de Vicente, P.; Cernicharo, J. Journal: ASTRONOMY & ASTROPHYSICS Publication date: 2021/03/18 DOI: 10.1051/0004-6361/202140553 Abstract: We present the first identification in interstellar space of the propargyl radical (CH2CCH). This species was observed in the cold dark cloud TMC-1 using the Yebes 40 m [...]

Topological input-output theory for directional amplification

2021-10-27T10:46:50+02:00Tags: , , |

Authors: Ramos, Tomas; Jose Garcia-Ripoll, Juan; Porras, Diego Journal: PHYSICAL REVIEW A Publication date: 2021/03/18 DOI: 10.1103/PhysRevA.103.033513 Abstract: We present a topological approach to the input-output relations of photonic driven-dissipative systems acting as directional amplifiers. Our theory relies on a mapping from the optical non-Hermitian coupling matrix to an effective topological insulator Hamiltonian. This mapping [...]

Light-matter interactions near photonic Weyl points

2021-10-27T10:46:50+02:00Tags: , , |

Authors: Garcia-Elcano, Inaki; Bravo-Abad, Jorge; Gonzalez-Tudela, Alejandro Journal: PHYSICAL REVIEW A Publication date: 2021/03/17 DOI: 10.1103/PhysRevA.103.033511 Abstract: Weyl photons appear when two three-dimensional photonic bands with linear dispersion are degenerate at a single momentum point, labeled as Weyl point. These points have remarkable properties such as being robust topological monopoles of Berry curvature as well [...]

The initial gas-phase sulfur abundance in the Orion Molecular Cloud from sulfur radio recombination lines

2021-10-27T10:46:50+02:00Tags: |

Authors: Goicoechea, Javier R.; Cuadrado, Sara Journal: ASTRONOMY & ASTROPHYSICS Publication date: 2021/03/16 DOI: 10.1051/0004-6361/202140517 Abstract: The abundances of chemical elements and their depletion factors are essential parameters for understanding the composition of the gas and dust that are ultimately incorporated into stars and planets. Sulfur is an abundant but peculiar element in the sense [...]

Rotational spectrum and internal dynamics of the hydrogen-bonded pyrrole-pyridine aromatic pair

2021-10-27T10:46:50+02:00Tags: |

Authors: Cabezas, Carlos; Peña, Isabel; Caminati, Walther Journal: SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY Publication date: 2021/03/15 DOI: 10.1016/j.saa.2020.119320 Abstract: Non-covalent interactions determine the three-dimensional structure and activity of biological molecules. In this work, the pyrrole-pyridine complex considered as a model of the N-H center dot center dot center dot N hydrogen-bonded Watson-Crick base [...]

Near-resonant effects in the quantum dynamics of the H+H2+->H2+H+ charge transfer reaction and isotopic variants

2021-10-27T10:46:51+02:00Tags: , , , |

Authors: Sanz-Sanz, Cristina; Aguado, Alfredo; Roncero, Octavio Journal: JOURNAL OF CHEMICAL PHYSICS Publication date: 2021/03/14 DOI: 10.1063/5.0044320 Abstract: The non-adiabatic quantum dynamics of the H + H2+-> H2 + H+ charge transfer reactions, and some isotopic variants, is studied with an accurate wave packet method. A recently developed 3 x 3 diabatic potential model is [...]

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