Now showing items 21-40 of 140

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      Cosmological constrains on fast transition Unified Dark Matter models 

      Lazcoz Sáez, Ruth ORCID; Leanizbarrutia Alonso, Iker; Salzano, Vincenzo (IOP Publishing, 2015)
      In this work we show the results obtained applying a Unified Dark Matter (UDM) model with a fast transition to a set of cosmological data. Two different functions to model the transition are tested, and the feasibility of ...
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      Cosmological Perturbations in Phantom Dark Energy Models 

      Albarran, Imanol; Bouhmadi López, Mariam ORCID; Morais, Joao (MDPI, 2017-03-06)
      The CDM paradigm, characterised by a constant equation of state w = -1 for dark energy, is the model that better fits observations. However, the same observations strongly support the possibility of a dark energy content ...
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      Cosmology in an accelerated universe: observations and phenomenology 

      Sendra Server, Irene (2012-07-27)
      En las últimas décadas la cosmología ha experimentado notables avances como consecuencia del desarrollo de nuevos experimentos que nos han abastecido con precisos datos observacionales. La calidad de estos datos ha permitido ...
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      Dalitz analysis of D0 → K− π+ η decays at Belle 

      Belle Collaboration; Schnell, Gunar (American Physical Society, 2020-07-06)
      [EN] We present the results of the first Dalitz plot analysis of the decay D0 → K−πþη. The analysis is performed on a data set corresponding to an integrated luminosity of 953 fb−1 collected by the Belle detector at the ...
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      Digital quantum simulations of spin models with superconducting circuits 

      Las Heras García, Urtzi (2017-05-24)
      A lo largo de la historia, el ser humano, consciente de su incapacidad natural para realizar diversas tareas, ha utilizado herramientas que le han permitido afrontar de forma cada vez más satisfactoria los problemas de ...
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      Doomsdays in a modified theory of gravity: a classical and a quantum approach 

      Albarran, Imanol; Bouhmadi López, Mariam ORCID; Chen, Che-Yu; Chen, Pisin (Elsevier, 2017-09-10)
      By far cosmology is one of the most exciting subject to study, even more so with the current bulk of observations we have at hand. These observations might indicate different kinds of doomsdays, if dark energy follows ...
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      Double layers in gravity theories 

      Martín Senovilla, José María ORCID (IOP Publishing, 2015)
      Gravitational double layers, unlike their classical electromagnetic counterparts, are thought to be forbidden in gravity theories. It has been recently shown, however, that they are feasible in, for instance, gravity ...
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      Effect of Interactions in the Interference Pattern of Bose-Einstein Condensates 

      Burchianti, Alessia; D'Errico, Chiara; Marconi, L.; Minardi, Francesco; Fort, Chiara; Modugno, Michele (American Physical Society, 2020-10-12)
      Understanding the effect of interactions in the phase evolution of expanding atomic Bose-Einstein condensates is fundamental to describing the basic phenomenon of matter wave interference. Many theoretical and experimental ...
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      Electroweak strings with dark scalar condensates and their stability 

      Forgács, Péter; Lukacs, Arpad Laszlo (American Physical Society, 2020-07-06)
      [EN] The stability of “visible” electroweak-type cosmic strings is investigated in an extension of the Standard Model by a minimal dark sector, consisting of a Uð1Þ gauge field, broken spontaneously by a scalar. The visible ...
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      Embedding quantum simulators 

      Di Candia, Roberto (2015-06-25)
      Quantum simulations consist in the reproduction of the dynamics of a quantum systemon a controllable platform, with the goal of capturing an interesting feature of the considered model. It is broadly believed that the ...
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      Energy and momentum transfer in one-dimensional trapped gases by stimulated light scattering 

      Fabbri, N.; Fort, C.; Modugno, Michele; Rosi, S.; Inguscio, M. (IOP Publishing, 2015-06-10)
      In ultracold atoms settings, inelastic light scattering is a preeminent technique to reveal static and dynamic properties at nonzero momentum. In this work, we investigate an array of one-dimensional trapped Bose gases, ...
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      Entanglement and extreme spin squeezing of unpolarized states 

      Vitagliano, Giuseppe; Apellaniz Asategui, Jagoba; Kleinmann, Matthias; Lücke, Bernd; Klempt, Carsten; Tóth, Géza (IOP Publishing, 2017-01-20)
      We present criteria to detect the depth of entanglement in macroscopic ensembles of spin-j particles using the variance and second moments of the collective spin components. The class of states detected goes beyond traditional ...
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      Entanglement loss in molecular quantum-dot qubits due to interaction with the environment 

      Blair, Enrique P.; Tóth, Géza; Lent, Craig S. (IOP Publishing, 2018-05-16)
      We study quantum entanglement loss due to environmental interaction in a condensed matter system with a complex geometry relevant to recent proposals for computing with single electrons at the nanoscale. We consider a ...
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      Entanglement negativity in the harmonic chain out of equilibrium 

      Eisler, Viktor; Zimborás, Zoltán (IOP Publishing, 2014-12-08)
      We study the entanglement in a chain of harmonic oscillators driven out of equilibrium by preparing the two sides of the system at different temperatures, and subsequently joining them together. The steady state is constructed ...
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      Eremu-teorien eta eredu analitikoen bidezko defektu kosmikoen ezaugarritzea 

      López Eiguren, Asier (2017-05-12)
      Kosmologiaren eredu estandarraren eta partikulen eredu estandarraren arteko zubi-lana egiteko hautagai interesgarrienetakoak defektu kosmikoak dira. Ondorioz, defektu kosmiko hauen ezaugarritze zehatzak berebiziko garrantzia ...
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      Erizaintza-prozesua: Gipuzkoako herrialdean izaniko erabileraren bilakaera 

      Huitzi Egilegor, Joseba Xabier ORCID (2012-05-14)
      Ameriketako Estatu Batuetan eta Kanadan 1950. urteetan sortu ostean, erizaintza-prozesua, egun, mundu osoko erizaintza-eskoletan, ospitaletan eta zentrotan erabiltzen da. Doktore-tesi honetan erizaintza-prozesuak Gipuzkoako ...
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      Erizaintzako prestakuntzaren eboluzio historikoa Gipuzkoan. Praktiketako gaitasunen diseinua egungo beharrei egokitzeko. 

      Uranga Iturrioz, María José (Servicio Editorial de la Universidad del País Vasco/Euskal Herriko Unibertsitatearen Argitalpen Zerbitzua, 2014-10-20)
      Doktore-tesi honen helburuak dira: Erizaintzako prestakuntzak Gipuzkoan izan duen eboluzio historikoa aztertzea, Europan izandako eboluzioarekin lotuz; eta, Europar Unibertsitate Eremu berria sortzeak eragin dituen aldaketen ...
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      Evidence for a vector charmoniumlike state in e + e − → D + s D ∗ s 2 ( 2573 ) − + c . c . 

      Belle Collaboration; Schnell, Gunar (American Physical Society, 2020-05-12)
      We report the measurement of e(+) e(-) -> D-s(+) Ds(2)*(2573)(-) c.c. via initial-state radiation using a data sample of an integrated luminosity of 921.9 fb(-1) collected with the Belle detector at the Upsilon(4S) and ...
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      Evidence for B+ -> h(c)K(+) and observation of eta(c()2S) -> p(p)over-bar pi(+)pi(-) 

      Belle Collaboration; Schnell, Gunar (American Physical Society, 2019-07-10)
      A search for the decays B+ -> h(c)K(+) and B-0 -> h(c)K(S)(0) is performed. Evidence for the decay B+ -> h(c)K(+) is found; its significance is 4.8 sigma. No evidence is found for B-0 -> h(c)K(S)(0). The branching fraction ...
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      f (R) Gravity Modifications: From The Action To The Data 

      Lazcoz Sáez, Ruth ORCID; Ortiz Baños, María; Salzano, Vincenzo (Springer, 2018-03-13)
      It is a very well established matter nowadays that many modified gravity models can offer a sound alternative to General Relativity for the description of the accelerated expansion of the universe. But it is also equally ...