Quantum Fourier analysis for multivariate functions and applications to a class of Schrodinger-type partial differential equations

2022-09-19T15:57:11+02:00Tags: , , |

Authors: Garcia-Molina, Paula; Rodriguez-Mediavilla, Javier; Jose Garcia-Ripoll, Juan Journal: PHYSICAL REVIEW A Publication date: 2022/01/31 DOI: 10.1103/PhysRevA.105.012433 Abstract: In this work we develop a highly efficient representation of functions and differential operators based on Fourier analysis. Using this representation, we create a variational hybrid quantum algorithm to solve static, Schrodinger-type, Hamiltonian partial differential equations (PDEs), [...]

Ultra-deep 31.0-50.3 GHz spectral survey of IRC+10216

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

Authors: Pardo, J. R.; Cernicharo, J.; Tercero, B.; Cabezas, C.; Bermudez, C.; Agundez, M.; Gallego, J. D.; Tercero, F.; Gomez-Garrido, M.; de Vicente, P.; Lopez-Perez, J. A. Journal: ASTRONOMY & ASTROPHYSICS Publication date: 2022/01/28 DOI: 10.1051/0004-6361/202142263 Abstract: Context. The carbon-rich envelope of the asymptotic giant branch star CW Leo, IRC+10216, is one of the richest [...]

Anomalous HCN emission from warm giant molecular clouds

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

Authors: Goicoechea, Javier R.; Lique, Francois; Santa-Maria, Miriam G. Journal: ASTRONOMY & ASTROPHYSICS Publication date: 2022/01/27 DOI: 10.1051/0004-6361/202142210 Abstract: Hydrogen cyanide (HCN) is considered a good tracer of the dense molecular gas that serves as fuel for star formation. However, recent large-scale surveys of giant molecular clouds (GMCs) have detected extended HCN rotational line emission [...]

Helium structures around SF5+ and SF6+: novel intermolecular potential and mass spectrometry experiments

2022-09-19T15:57:18+02:00Tags: , , , |

Authors: Zunzunegui-Bru, Eva; Gruber, Elisabeth; Bergmeister, Stefan; Meyer, Miriam; Zappa, Fabio; Bartolomei, Massimiliano; Pirani, Fernando; Villarreal, Pablo; Gonzalez-Lezana, Tomas; Scheier, Paul Journal: PHYSICAL CHEMISTRY CHEMICAL PHYSICS Publication date: 2022/01/26 DOI: 10.1039/d1cp04725f Abstract: Helium clusters around the recently experimentally observed sulphur hexafluoride SF6+ and sulphur pentafluoride SF5+ ions are investigated using a combined experimental and theoretical [...]

Real Space Visualization of Entangled Excitonic States in Charged Molecular Assemblies

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

Authors: Dolezal, Jiri; Canola, Sofia; Hapala, Prokop; Ferreira, Rodrigo Cezar de Campos; Merino, Pablo; Svec, Martin Journal: ACS NANO Publication date: 2022/01/25 DOI: 10.1021/acsnano.1c08816 Abstract: Entanglement of excitons holds great promise for the future of quantum computing, which would use individual molecular dyes as building blocks of their circuitry. Studying entangled excitonic eigenstates emerging in [...]

Discovery of C5H+ and detection of C3H+ in TMC-1 with the QUIJOTE line surveyx22c6;

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

Authors: Cernicharo, J.; Agundez, M.; Cabezas, C.; Fuentetaja, R.; Tercero, B.; Marcelino, N.; Endo, Y.; Pardo, J. R.; de Vicente, P. Journal: ASTRONOMY & ASTROPHYSICS Publication date: 2022/01/24 DOI: 10.1051/0004-6361/202142992 Abstract: We report the discovery of the C5H+ cation toward TMC-1 with the QUIJOTE line survey. Four lines from Jx2004;=7 - 6 up to J10 [...]

Ultrastrong Capacitive Coupling of Flux Qubits

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

Authors: Hita-Perez, Maria; Jauma, Gabriel; Pino, Manuel; Garcia-Ripoll, Juan Jose Journal: PHYSICAL REVIEW APPLIED Publication date: 2022/01/24 DOI: 10.1103/PhysRevApplied.17.014028 Abstract: A flux qubit can interact strongly when it is capacitively coupled to other circuit elements. This interaction can be separated into two parts, one acting on the qubit subspaces and one in which excited states [...]

On some unexplored decoherence aspects in the Caldeira-Leggett formalism: arrival time distributions, identical particles and diffraction in time

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

Authors: Mousavi, S., V; Miret-Artes, S. Journal: EUROPEAN PHYSICAL JOURNAL PLUS Publication date: 2022/01/19 DOI: 10.1140/epjp/s13360-022-02367-6 Abstract: Some unexplored decoherence aspects within the Caldeira-Leggett master equation are analyzed and discussed. The decoherence process is controlled by the two environment parameters, the relaxation rate or friction and the temperature, leading to a gradual transition from the [...]

Assessment of DFT approaches in noble gas clathrate-like clusters: stability and thermodynamics

2022-09-19T15:57:18+02:00Tags: , , , |

Authors: Yanes-Rodriguez, Raquel; Prosmiti, Rita Journal: PHYSICAL CHEMISTRY CHEMICAL PHYSICS Publication date: 2022/01/19 DOI: 10.1039/d1cp04935f Abstract: We have assessed the performance and accuracy of different wavefunction-based electronic structure methods, such as DFMP2 and domain-based local pair-natural orbital (DLPNO-CCSD(T)), as well as a variety of density functional theory (DFT) approaches on He@(H2O)(N) cage systems. We have [...]

Detection of the propargyl radical at lambda 3 mm

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

Authors: Agundez, M.; Marcelino, N.; Cabezas, C.; Fuentetaja, R.; Tercero, B.; de Vicente, P.; Cernicharo, J. Journal: ASTRONOMY & ASTROPHYSICS Publication date: 2022/01/17 DOI: 10.1051/0004-6361/202142678 Abstract: We report the detection of the propargyl radical (CH2CCH) in the cold dark cloud TMC-1 in the lambda 3 mm wavelength band. We recently discovered this species in space [...]

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