Dirac equation in exotic spacetimes

2020-01-16T12:54:28+01:00Tags: , |

Authors: Faba Garcia, Javier; Sabin, Carlos Contribution: Article Journal: PHYSICAL REVIEW D Publication date: 2019/01/14 DOI: 10.1103/PhysRevD.99.025008 Abstract: We find solutions of the Dirac equation in curved spacetime. In particular, we consider 1 + 1 dimensional sections of several exotic metrics: the Alcubierre metric, which describes a scenario that allows faster-than-light velocity; the Godel metric, which [...]

Elucidating the multiple structures of pipecolic acid by rotational spectroscopy

2020-01-16T12:54:28+01:00Tags: , , , |

Authors: Simao, A.; Cabezas, C.; Leon, I.; Alonso, E. R.; Mata, S.; Alonso, J. L. Contribution: Article Journal: PHYSICAL CHEMISTRY CHEMICAL PHYSICS Publication date: 2019/02/28 DOI: 10.1039/c8cp06120c Abstract: The complex conformational space of the non-proteinogenic cyclic amino acid pipecolic acid has been explored in the gas phase for the first time. Solid pipecolic acid samples were [...]

Modulated Continuous Wave Control for Energy-Efficient Electron-Nuclear Spin Coupling

2020-01-16T12:54:28+01:00Tags: , |

Authors: Casanova, J.; Torrontegui, E.; Plenio, M. B.; Garcia-Ripoll, J. J.; Solano, E. Contribution: Article Journal: PHYSICAL REVIEW LETTERS Publication date: 2019/01/10 DOI: 10.1103/PhysRevLett.122.010407 Abstract: We develop energy efficient, continuous microwave schemes to couple electron and nuclear spins, using phase or amplitude modulation to bridge their frequency difference. These controls have promising applications in biological systems, [...]

Transversality and lattice surgery: Exploring realistic routes toward coupled logical qubits with trapped-ion quantum processors

2020-01-16T12:54:28+01:00Tags: , , |

Authors: Gutierrez, M.; Mueller, M.; Bermudez, A. Contribution: Article Journal: PHYSICAL REVIEW A Publication date: 2019/02/25 DOI: 10.1103/PhysRevA.99.022330 Abstract: Active quantum error correction has been identified as a crucial ingredient of future quantum computers, motivating the recent experimental efforts to encode logical quantum bits using small topological codes. In addition to the demonstration of the beneficial [...]

Tycho’s Supernova: The View from Gaia

2020-01-16T12:54:28+01:00Tags: |

Authors: Ruiz-Lapuente, Pilar; Gonzlez Hernandez, Jonay, I; Mor, Roger; Romero-Gomez, Merce; Miret-Roig, Nuria; Figueras, Francesca; Bedin, Luigi R.; Canal, Ramon; Mendez, Javier Contribution: Article Journal: ASTROPHYSICAL JOURNAL Publication date: 2019/01/10 DOI: 10.3847/1538-4357/aaf1c1 Abstract: SN 1572 (Tycho Brahe's supernova) clearly belongs to the Ia (thermonuclear) type. It was produced by the explosion of a white dwarf (WD) [...]

Spectroscopy of a rotating hydrogen molecule in carbon nanotubes

2020-01-16T12:54:28+01:00Tags: , , , |

Authors: Pilar de Lara-Castells, Maria; Mitrushchenkov, Alexander O. Contribution: Article Journal: PHYSICAL CHEMISTRY CHEMICAL PHYSICS Publication date: 2019/02/21 DOI: 10.1039/c8cp04109a Abstract: A first-principles study of the spectroscopy of a single hydrogen molecule rotating inside and outside of carbon nanotubes is presented. Density functional theory (DFT)-based symmetry-adapted perturbation theory (SAPT) is applied to analyze the influence of [...]

Uncertainty relations for time-averaged weak values

2020-01-16T12:54:28+01:00Tags: , , |

Authors: Pollak, Eli; Miret-Artes, Salvador Contribution: Article Journal: PHYSICAL REVIEW A Publication date: 2019/01/08 DOI: 10.1103/PhysRevA.99.012108 Abstract: Time averaging of weak values using the quantum transition path time probability distribution enables us to establish a general uncertainty relation for the weak values of two not necessarily Hermitian operators. This new relation is a weak value analog [...]

Gas infall and possible circumstellar rotation in R Leonis

2020-01-16T12:54:28+01:00Tags: |

Authors: Fonfria, J. P.; Santander-Garcia, M.; Cernicharo, J.; Velilla-Prieto, L.; Agundez, M.; Marcelino, N.; Quintana-Lacaci, G. Contribution: Article Journal: ASTRONOMY & ASTROPHYSICS Publication date: 2019/02/19 DOI: 10.1051/0004-6361/201834840 Abstract: We present new interferometer molecular observations of R Leo taken at 1.2 mm with the Atacama Large Millimeter Array with an angular resolution up to similar or equal [...]

Enhancement of the degree of control of photofragment distributions by laser phase modulation

2020-01-16T12:54:28+01:00Tags: , , , , |

Authors: Garcia-Vela, A. Contribution: Article Journal: INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY Publication date: 2019/02/15 DOI: 10.1002/qua.25813 Abstract: The possibility of enhancing the degree of control of a transient photofragment distribution achieved by means of laser phase modulation is explored. Such a control is exerted through interference between overlapping resonances, which are populated in a superposition by [...]

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