Out-of-time-order correlator in the quantum Rabi model

2022-09-19T15:57:15+02:00Tags: , , |

Authors: Kirkova, Aleksandrina, V; Porras, Diego; Ivanov, Peter A. Journal: PHYSICAL REVIEW A Publication date: 2022/03/25 DOI: 10.1103/PhysRevA.105.032444 Abstract: We investigate signatures of chaos and equilibration in the quantum Rabi model, which exhibits a quantum phase transition when the ratio of the atomic level-splitting to bosonic frequency grows to infinity. We show that the out-of-time-order [...]

A new protonated molecule discovered in TMC-1: HCCNCH+& x22c6;

2022-09-19T15:57:06+02:00Tags: |

Authors: Agundez, M.; Cabezas, C.; Marcelino, N.; Fuentetaja, R.; Tercero, B.; de Vicente, P.; Cernicharo, J. Journal: ASTRONOMY & ASTROPHYSICS Publication date: 2022/03/24 DOI: 10.1051/0004-6361/202243396 Abstract: In recent years we have seen an important increase in the number of protonated molecules detected in cold dense clouds. Here we report the detection in TMC-1 of HCCNCH+, [...]

An ab initio study of the photodissociation of the vinyl radical

2022-09-19T15:57:09+02:00Tags: , , , |

Authors: Bouallagui, A.; Zanchet, A.; Banares, L.; Garcia-Vela, A. Journal: PHYSICAL CHEMISTRY CHEMICAL PHYSICS Publication date: 2022/03/23 DOI: 10.1039/d2cp00180b Abstract: Photodissociation of the vinyl radical through pathways CH2CH -> CH2C + H, CH2CH -> CHCH + H, and CH2CH -> CH2 + CH is investigated by means of high-level ab initio calculations. Potential-energy curves (PECs) [...]

Discovery of a new molecular ion, HC7NH+, in TMC-1 & x22c6;

2022-09-19T15:57:09+02:00Tags: |

Authors: Cabezas, C.; Agundez, M.; Marcelino, N.; Tercero, B.; Fuentetaja, R.; de Vicente, P.; Cernicharo, J. Journal: ASTRONOMY & ASTROPHYSICS Publication date: 2022/03/23 DOI: 10.1051/0004-6361/202142972 Abstract: We report the detection of the protonated form of HC7N in TMC-1. The discovery of the cation HC7NH+ was carried out via the observation of nine harmonically related lines [...]

Tunable Directional Emission and Collective Dissipation with Quantum Metasurfaces

2022-09-19T15:57:10+02:00Tags: , |

Authors: Fernandez-Fernandez, D.; Gonzalez-Tudela, A. Journal: PHYSICAL REVIEW LETTERS Publication date: 2022/03/14 DOI: 10.1103/PhysRevLett.128.113601 Abstract: Subwavelength atomic arrays, recently labeled as quantum metamaterials, have emerged as an exciting platform for obtaining novel quantum optical phenomena. The strong interference effects in these systems generate subradiant excitations that propagate through the atomic array with very long lifetimes. [...]

Unraveling the Origin of Symmetry Breaking in H2O@C-60 Endofullerene Through Quantum Computations

2022-09-19T15:57:10+02:00Tags: , , , |

Authors: Carrillo-Bohorquez, Orlando; Valdes, Alvaro; Prosmiti, Rita Journal: CHEMPHYSCHEM Publication date: 2022/03/14 DOI: 10.1002/cphc.202200034 Abstract: We explore the origin of the anomalous splitting of the 1(01) levels reported experimentally for the H2O@C-60 endofullerene, in order to give some insight about the physical interpretations of the symmetry breaking observed. We performed fully-coupled quantum computations within the [...]

Spin Many-Body Phases in Standard- and Topological-Waveguide QED Simulators

2022-09-19T15:57:06+02:00Tags: , , |

Authors: Bello, M.; Platero, G.; Gonzalez-Tudela, A. Journal: PRX QUANTUM Publication date: 2022/03/07 DOI: 10.1103/PRXQuantum.3.010336 Abstract: Waveguide QED has emerged as a powerful analog quantum simulator due to the possibility of mediating versatile spin-spin interactions with tunable sign, range, and even dimerization. Yet, despite their potential, the many-body phases emerging from these systems have only [...]

Organic Molecules in Interstellar Space: Latest Advances

2022-09-19T15:57:14+02:00Tags: |

Authors: Guelin, Michel; Cernicharo, Jose Journal: FRONTIERS IN ASTRONOMY AND SPACE SCIENCES Publication date: 2022/03/02 DOI: 10.3389/fspas.2022.787567 Abstract: Although first considered as too diluted for the formation of molecules in-situ and too harsh an environment for their survival, the interstellar medium has turned out to host a rich palette of molecular species: to date, 256 [...]

Capturing quantum effects with quasi-classical trajectories in the D + H-3(+) -> H2D+ + H reaction

2022-09-19T15:57:09+02:00Tags: , , , |

Authors: Braunstein, Matthew; Bonnet, Laurent; Roncero, Octavio Journal: PHYSICAL CHEMISTRY CHEMICAL PHYSICS Publication date: 2022/03/02 DOI: 10.1039/d1cp04244k Abstract: We present quasi-classical trajectory (QCT) cross sections, rate constants, and product state distributions for the D + H-3(+) -> H2D+ + H reaction. Using the same H-4(+) potential surface, the rate constants obtained from several QCT-based methods [...]

Absolute total electron detachment and relative ionisation cross sections for O-2 (-) collisions with O-2 in the energy range (10-1500 eV)

2022-09-19T15:57:14+02:00Tags: , |

Authors: Guerra, Carlos; Lozano, Ana, I; Mendes, Monica F.; Kumar, Sarvesh; Oller, Juan C.; Limao-Vieira, Paulo; Garcia, Gustavo Journal: PLASMA SOURCES SCIENCE & TECHNOLOGY Publication date: 2022/03/01 DOI: 10.1088/1361-6595/ac4e22 Abstract: Absolute total electron detachment cross for O-2 (-) collisions with O-2 are reported for impact energies ranging from 10 to 1600 eV as measured with [...]

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