Recent Submissions

  • Few-body bound states of two-dimensional bosons 

    Guijarro Gámez, Grecia; Astrakharchik, Grigori; Boronat Medico, Jordi; Bazak, Betzalel; Petrov, D. S. (American Physical Society (APS), 2020-04-07)
    Article
    Open Access
    We study clusters of the type $A_NB_M$ with N=M=3 in a two-dimensional mixture of A and B bosons, with attractive AB and equally repulsive AA and BB interactions. In order to check universal aspects of the problem, we ...
  • Development of flow regime maps for lead lithium eutectic–helium flows 

    Mas de les Valls Ortiz, Elisabet; Cegielski, Andrzej; Jaros, Mark; Pérez Ferragut, Marina; Batet Miracle, Lluís; Freixa Terradas, Jordi (2020-09-01)
    Article
    Restricted access - publisher's policy
    nstitute for Plasma Research (IPR), Gandhinagar (India) is currently involved in the design and development of its Lead-Lithium Ceramic Breeder (LLCB) module for testing in the International Thermo-nuclear Experimental ...
  • Comparative study of mechanical and electrical relaxations in poly(etherimide). Part 2 

    Diaz Calleja, Ricardo; Friederichs, S.; Jaímes, C.; Sanchis, Jose Maria; Belana Punseti, Juan; Cañadas Lorenzo, Juan Carlos; Diego Vives, José Antonio; Mudarra López, Miguel (1998-05)
    Article
    Restricted access - publisher's policy
    The curves describing the relaxation behaviour of poly(etherimide) at several frequencies shows in the dielectric lossÈtemperature plot c and b relax- ations centred at [95¡C and 100¡C, respectively, at 10 Hz. The glassÈrubber ...
  • The benefits of very low earth orbit for earth observation missions 

    Crisp, Nicholas H.; Roberts, Peter C.E; Livadiotti, Sabrina; García-Almiñana, Daniel; Rodríguez Donaire, Silvia; Sureda Anfres, Miquel (2020-08)
    Article
    Restricted access - publisher's policy
    Very low Earth orbits (VLEO), typically classified as orbits below approximately 450 km in altitude, have the potential to provide significant benefits to spacecraft over those that operate in higher altitude orbits. This ...
  • RF Helicon-based Inductive Plasma Thruster (IPT) Design for an Atmosphere-Breathing Electric Propulsion System (ABEP) 

    Romano, Francesco; Chan, Y. A.; Herdrich, Georg; García-Almiñana, Daniel; Rodríguez Donaire, Silvia; Sureda Anfres, Miquel (2020-11)
    Article
    Restricted access - publisher's policy
    Challenging space missions include those at very low altitudes, where the atmosphere is source of aerodynamicdrag on the spacecraft. To extend such missions lifetime, an efficient propulsion system is required. Onesolution ...
  • Translationally invariant metamirrors for spatial filtering of light beams 

    Wang, Pei-Yu; Herrero Simon, Ramon; Botey Cumella, Muriel; Cheng, Yu-Chiech; Staliunas, Kestutis (American Physical Society (APS), 2020-07-01)
    Article
    Open Access
    We propose a translationally invariant metamirror for light filtering in reflection. The device consists of athin transverse grating in the micron scale positioned in front of a flat mirror. We analyze the performance ...
  • The dynamics of digits: calculating Pi with Galperin's billiards 

    Aretxabaleta, Xabier M.; Gonchenko, Marina; Harshman, Nathan L.; Jackson, Steven Glenn; Olshanii, Maxim; Astrakharchik, Grigori (Multidisciplinary Digital Publishing Institute (MDPI), 2020-04-01)
    Article
    Open Access
    In Galperin billiards, two balls colliding with a hard wall form an analog calculator for the digits of the number p . This classical, one-dimensional three-body system (counting the hard wall) calculates the digits of p ...
  • Archaeomagnetic study of a limekiln in the Les Ferreres Roman aqueduct, World Heritage Site of Tarraco 

    Casas, Lluís; Auguet Sangrá, Carlota E.; Guasch Ferré, Núria; Gómez Paccard, Miriam; Pitarch Martí, África; Prada Pérez, José Luís; Sanjurjo-Sánchez, Jorge; Menchón Bes, Joan; Badia Cortada, Marta; Díaz García, Moisés (2020-08-16)
    Article
    Restricted access - publisher's policy
    The aqueduct of Les Ferreres is a major element of the Archaeological Ensemble of Tarraco. Although the ashlars of the aqueduct are stacked without mortar, lime was used in some parts and lime was certainly used in later ...
  • Attitude control for satellites flying in VLEO using aerodynamic surfaces 

    Cañas Muñoz, Valentin; González, David; Becedas, Jonathan; Rodríguez Donaire, Silvia; García-Almiñana, Daniel; Sureda Anfres, Miquel; Nieto, Miriam; Muñoz, Candia (British Interplanetary Society, 2020)
    Article
    Restricted access - publisher's policy
    This paper analyses the use of aerodynamic control surfaces, whether passive or active, in order to carry out very low Earth orbit (VLEO) attitude maneuver operations. Flying a satellite in a very low Earth orbit with an ...
  • Plume or bubble? Mixed-convection flow regimes and city-scale circulations 

    Omidvar, Hamidreza; Bou-Zeid, Elie; Li, Qi; Mellado González, Juan Pedro; Klein, Petra (2020-08-25)
    Article
    Restricted access - publisher's policy
    Large-scale circulations around a city are co-modulated by the urban heat islandand by regional wind patterns. Depending on these variables, the circulations fall into different regimes ranging from advection-dominated ...
  • Parametric attosecond pulse amplification far from the ionization threshold from high order harmonic generation in He+ 

    Serrat Jurado, Carles; Seres, Jozsef; Seres, Enikoe; Dinh, T. H.; Hasegawa, N.; Nishikino, M.; Namba, S. (2020-07-31)
    Article
    Open Access
    Parametric amplification of attosecond coherent pulses around 100 eV at the single– atom level is demonstrated for the first time by using the 3D time–dependent Schrödinger equation in high–harmonic generation processes ...
  • Symmetry-breaking waves and space-time modulation mechanisms in two-dimensional plane Poiseuille flow 

    Ayats López, Roger; Meseguer Serrano, Álvaro; Mellibovsky Elstein, Fernando (2020-09-18)
    Article
    Open Access
    We investigate two distinct scenarios of spatial modulation that are candidate mechanisms for streamwise localization of waves in two-dimensional plane Poiseuille flow. The first one stems from a symmetry-breaking bifurcation ...

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