Publications (2020)
Publications sorted by date descending
Detection of vibrationally excited HC7N and HC9N in IRC+10216
Authors: Pardo, J. R.; Bermudez, C.; Cabezas, C.; Agundez, M.; Gallego, J. D.; Fonfria, J. P.; Velilla-Prieto, L.; Quintana-Lacaci, G.; Tercero, B.; Guelin, M.; Cernicharo, J.
Contribution: Article
Journal: ASTRONOMY & ASTROPHYSICS
Publication date: 2020/08/10
DOI: 10.1051/0004-6361/202038571
Abstract: Observations of IRC +10216 with the Yebes 40 m telescope between 31 and 50 GHz have revealed more than 150 unidentified lines. Some of them can be grouped into a new series of 26 doublets, harmonically related with integer quantum numbers ranging from J(up)=54 to 80. The separation of the doublets increases systematically […]
Electron-impact excitation of the (5s(2)5p) P-2(1/2) -> (5s(2)6s) S-2(1/2) transition in indium: Theory and experiment
Authors: Hamilton, K. R.; Zatsarinny, O.; Bartschat, K.; Rabasovic, M. S.; Sevic, D.; Marinkovic, B. P.; Dujko, S.; Atic, J.; Fursa, D., V; Bray, I; McEachran, R. P.; Blanco, F.; Garcia, G.; Stokes, P. W.; White, R. D.; Brunger, M. J.
Contribution: Article
Journal: PHYSICAL REVIEW A
Publication date: 2020/08/03
DOI: 10.1103/PhysRevA.102.022801
Abstract: We present angle-integrated and angle-differential cross sections for electron-impact excitation of the (5s(2)5p) P-2(1/2) -> (5s(2)6s) S-2(1/2) transition in atomic indium. Experimental data for six incident electron energies between 10 and 100 eV are compared with predictions from […]
Mechano-Optical Switching of a Single Molecule with Doublet Emission
Authors: Dolezal, Jiri; Mutombo, Pingo; Nachtigallova, Dana; Jelinek, Pavel; Merino, Pablo; Svec, Martin
Contribution: Article
Journal: ACS NANO
Publication date: 2020/07/28
Abstract: The ability to control the emission from single-molecule quantum emitters is an important step toward their implementation in optoelectronic technology. Phthalocyanine and derived metal complexes on thin insulating layers studied by scanning tunneling microscope-induced luminescence (STML) offer an excellent playground for tuning their excitonic and electronic states by Coulomb interaction and to showcase their high environmental sensitivity. Copper phthalocyanine (CuPc) has an open-shell electronic structure, and its […]
Theory of waveguide QED with moving emitters
Authors: Sanchez-Burillo, Eduardo; Gonzalez-Tudela, Alejandro; Gonzalez-Ballestero, Carlos
Contribution: Article
Journal: PHYSICAL REVIEW A
Publication date: 2020/07/28
DOI: 10.1103/PhysRevA.102.013726
Abstract: We theoretically study a system composed of a waveguide and a quantum emitter moving in a one-dimensional potential along the waveguide axis. We focus on the single-excitation subspace and treat the emitter motional degrees of freedom fully quantum mechanically. We first characterize single-photon scattering off a single moving quantum emitter, showing both direction-dependent transmission and recoil-induced reduction of the quantum emitter motional energy. We then characterize the bound states within the band […]
Seeing topological edge and bulk currents in time-of-flight images
Authors: Rubio-Garcia, Alvaro; Self, Chris N.; Jose Garcia-Ripoll, Juan; Pachos, Jiannis K.
Contribution: Article
Journal: PHYSICAL REVIEW B
Publication date: 2020/07/23
DOI: 10.1103/PhysRevB.102.041123
Abstract: Here we provide a general methodology to directly measure the topological currents emerging in the optical lattice implementation of the Haldane model. Alongside the edge currents supported by gapless edge states, transverse currents can emerge in the bulk of the system whenever the local potential is varied in space, even if it does not cause a phase transition. In optical lattice implementations the overall harmonic potential that […]
Topological bulk states and their currents
Authors: Self, Chris N.; Rubio-Garcia, Alvaro; Jose Garcia-Ripoll, Juan; Pachos, Jiannis K.
Contribution: Article
Journal: PHYSICAL REVIEW B
Publication date: 2020/07/23
DOI: 10.1103/PhysRevB.102.045424
Abstract: We provide evidence that, alongside topologically protected edge states, two-dimensional Chern insulators also support localized bulk states deep in their valence and conduction bands. These states manifest when local potential gradients are applied to the bulk, while all parts of the system remain adiabatically connected to the same phase. In turn, the bulk states produce bulk current transverse to the potential difference. This occurs even when the […]
The millimeter-wave spectrum and astronomical search for ethyl methyl sulfide
Authors: Cabezas, C.; Bermudez, C.; Tercero, B.; Cernicharo, J.
Contribution: Article
Journal: ASTRONOMY & ASTROPHYSICS
Publication date: 2020/07/21
DOI: 10.1051/0004-6361/202038177
Abstract: Context. Sulfur-containing molecules constitute only 8% of the molecules observed in the interstellar medium (ISM), in spite of the fact that sulfur has been shown to be an abundant element in the ISM. In order to understand the chemical behavior of the ISM and specific cases like the missing sulfur reservoir, a detailed chemical molecular composition in the ISM must be mapped out. Aims. Our goal is to investigate the […]
Interference of a resonance state with itself: a route to control its dynamical behaviour
Authors: Garcia-Vela, A.
Contribution: Article
Journal: PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Publication date: 2020/07/14
DOI: 10.1039/d0cp00392a
Abstract: It is demonstrated both numerically and mathematically that the dynamical behavior of an isolated resonance state, which comprises the resonance decay lifetime and the asymptotic fragment state distribution produced upon resonance decay, can be extensively controlled by means of quantum interference induced by a laser field in the weak-field regime. The control scheme applied is designed to induce interference between amplitudes excited at two different energies of the resonance line shape, namely the resonance energy […]
Limits of photon-mediated interactions in one-dimensional photonic baths
Authors: Sanchez-Burillo, Eduardo; Porras, Diego; Gonzalez-Tudela, Alejandro
Contribution: Article
Journal: PHYSICAL REVIEW A
Publication date: 2020/07/08
DOI: 10.1103/PhysRevA.102.013709
Abstract: The exchange of off-resonant propagating photons between distant quantum emitters induces coherent interactions among them. The range of such interactions, and whether they are accompanied by dissipation, depends on the photonic energy dispersion, its dimensionality, and/or the light-matter couplings. We characterize the limits of photon-mediated interactions for the case of generic one-dimensional photonic baths under the typical assumptions, i.e., finite range hoppings for the photonic bath plus local and rotating-wave light-matter couplings. […]
Tripartite Genuine Non-Gaussian Entanglement in Three-Mode Spontaneous Parametric Down-Conversion
Authors: Agusti, A.; Chang, C. W. Sandbo; Quijandria, F.; Johansson, G.; Wilson, C. M.; Sabin, C.
Contribution: Article
Journal: PHYSICAL REVIEW LETTERS
Publication date: 2020/07/08
DOI: 10.1103/PhysRevLett.125.020502
Abstract: We show that the states generated by a three-mode spontaneous parametric down-conversion (SPDC) interaction Hamiltonian possess tripartite entanglement of a different nature to other paradigmatic three-mode entangled states generated by the combination of two-mode SPDC interactions. While two-mode SPDC generates Gaussian states whose entanglement can be characterized by standard criteria based on two-mode quantum correlations, these criteria fail to capture the entanglement generated […]
Criegee intermediates meet rotational spectroscopy
Authors: Cabezas, Carlos; Nakajima, Masakazu; Endo, Yasuki
Contribution: Review
Journal: INTERNATIONAL REVIEWS IN PHYSICAL CHEMISTRY
Publication date: 2020/07/02
DOI: 10.1080/0144235X.2020.1782651
Abstract: Carbonyl oxides, R1R2COO, alternatively known as Criegee intermediates (CIs), are short-lived molecules produced from ozonolysis of alkenes. These ozonolysis reactions yield highly excited CIs, and most of them promptly decay with emission of the OH radical and other products. Some of the nascent CIs are stabilised by collisional relaxation with surrounding molecules, and react with atmospheric trace constituents, such as SO(2)and gaseous organic compounds, converting them to more highly oxygenated […]
From Molecular Aggregation to a One-Dimensional Quantum Crystal of Deuterium Inside a Carbon Nanotube of 1 nm Diameter
Authors: de Lara-Castells, Maria Pilar; Mitrushchenkov, Alexander O.
Contribution: Article
Journal: JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Publication date: 2020/07/02
DOI: 10.1021/acs.jpclett.0c01432
Abstract: The quantum motion of clusters of up to four deuterium molecules under confinement in a single-wall (1 nm diameter) carbon nanotube is investigated by applying a highly accurate full quantum treatment of the most relevant nuclear degrees of freedom and an ab initio-derived potential model of the underlying dispersion-dominated intermolecular interactions. The wave functions and energies are calculated using an ad hoc-developed discrete variable representation (DVR) numerical approach in […]
Molecular globules in the Veil bubble of Orion: IRAM 30 m (CO)-C-12, (CO)-C-13, and (CO)-O-18 (2-1) expanded maps of Orion A?
Authors: Goicoechea, J. R.; Pabst, C. H. M.; Kabanovic, S.; Santa-Maria, M. G.; Marcelino, N.; Tielens, A. G. G. M.; Hacar, A.; Berne, O.; Buchbender, C.; Cuadrado, S.; Higgins, R.; Kramer, C.; Stutzki, J.; Suri, S.; Teyssier, D.; Wolfire, M.
Contribution: Article
Journal: ASTRONOMY & ASTROPHYSICS
Publication date: 2020/07/01
DOI: 10.1051/0004-6361/202037455
Abstract: Strong winds and ultraviolet (UV) radiation from O-type stars disrupt and ionize their molecular core birthplaces, sweeping up material into parsec-size shells. Owing to dissociation by starlight, the thinnest shells are expected to host low molecular abundances and therefore […]
Expanding bubbles in Orion A: [CII] observations of M 42, M 43, and NGC 1977
Authors: Pabst, C. H. M.; Goicoechea, J. R.; Teyssier, D.; Berne, O.; Higgins, R. D.; Chambers, E. T.; Kabanovic, S.; Gusten, R.; Stutzki, J.; Tielens, A. G. G. M.
Contribution: Article
Journal: ASTRONOMY & ASTROPHYSICS
Publication date: 2020/07/01
DOI: 10.1051/0004-6361/202037560
Abstract: Context. The Orion Molecular Cloud is the nearest massive-star forming region. Massive stars have profound effects on their environment due to their strong radiation fields and stellar winds. Stellar feedback is one of the most crucial cosmological parameters that determine the properties and evolution of the interstellar medium in galaxies.Aims. […]
See Change: VLT spectroscopy of a sample of high-redshift Type Ia supernova host galaxies
Authors: Williams, S. C.; Hook, I. M.; Hayden, B.; Nordin, J.; Aldering, G.; Boone, K.; Goobar, A.; Lidman, C. E.; Perlmutter, S.; Rubin, D.; Ruiz-Lapuente, P.; Saunders, C.
Contribution: Article
Journal: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Publication date: 2020/07/01
Abstract: The Supernova Cosmology Project has conducted the ‘See Change’ programme, aimed at discovering and observing high-redshift (1.13