Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of LisbonPT1.3k papers
- Universidade Técnica de LisboaPT388 papers
- Centre National de la Recherche ScientifiqueFR326 papers
- Instituto de Plasmas e Fusão NuclearPT209 papers
- European Organization for Nuclear ResearchCH202 papers
- Centro de Física Teórica de Partículas201 papers
- Instituto Politécnico de LisboaPT190 papers
- Instituto de TelecomunicaçõesPT175 papers
- Universitat de ValènciaES175 papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR143 papers
- Centro de Astrofísica e GravitaçãoPT133 papers
- LIP - Laboratory of Instrumentation and Experimental Particle PhysicsPT133 papers
118 papers · 1 filter
Mott insulator breakdown through pattern formation
Pedro Ribeiro, Andrey E. Antipov, Alexey N. Rubtsov
We study the breakdown of a Mott insulator with the thermodynamic imbalance induced by an applied bias voltage. By analyzing the instabilities of the magnetic susceptibility, we de…
Non-Markovian effects in electronic and spin transport
Pedro Ribeiro, Vitor R. Vieira
We derive a non-Markovian master equation for the evolution of a class of open quantum systems consisting of quadratic fermionic models coupled to wide-band reservoirs. This is don…
Charge and spin transport in a metal-semiconductor heterostructure with double Schottky barriers
S. Wolski, C. Jasiukiewicz, V. K. Dugaev +3
Taking into account the available experimental results, we model the electronic properties and current-voltage characteristics of a ferromagnet-semiconductor junction. The Fe/GaAs…
Homotopy type of free group character varieties
Ana Casimiro, Carlos Florentino, Sean Lawton +1
Let G be a real reductive algebraic group with maximal compact subgroup K, and let F be a rank r free group. Here, we summarize the construction of a natural strong deformation ret…
Systematic Dimensionality Reduction for Quantum Walks: Optimal Spatial Search and Transport on Non-Regular Graphs
Leonardo Novo, Shantanav Chakraborty, Masoud Mohseni +2
Continuous time quantum walks provide an important framework for designing new algorithms and modelling quantum transport and state transfer problems. Often, the graph representing…
Macroscopic (and Microscopic) Massless Modes
Michael C. Abbott, Inês Aniceto
We study certain spinning strings exploring the flat directions of AdS3 x S3 x S3 x S1, the massless sector cousins of su(2) and sl(2) sector spinning strings. We describe these, a…
Chiral Squaring
S. Nagy
We construct the states and symmetries of N = 4 super-Yang-Mills by tensoring two N = 1 chiral multiplets and introducing two extra SUSY generators. This allows us to write the max…
Future sensitivity of neutrino telescopes to dark matter annihilations from the cosmic diffuse neutrino signal
Angeles Moline, Alejandro Ibarra, Sergio Palomares-Ruiz
Cosmological observations and cold dark matter N-body simulations indicate that our Universe is populated by numerous halos, where dark matter particles annihilate, potentially pro…
Spin and quadrupole contributions to the motion of astrophysical binaries
Jan Steinhoff
Compact objects in general relativity approximately move along geodesics of spacetime. It is shown that the corrections to geodesic motion due to spin (dipole), quadrupole, and hig…
Chiral-symmetry breaking and confinement in Minkowski space
Elmar P. Biernat, M. T. Peña, J. E. Ribeiro +2
We present a model for the quark-antiquark interaction formulated in Minkowski space using the Covariant Spectator Theory. The quark propagators are dressed with the same kernel th…
A convex formulation for hyperspectral image superresolution via subspace-based regularization
Miguel Simões, José Bioucas-Dias, Luis B. Almeida +1
Hyperspectral remote sensing images (HSIs) usually have high spectral resolution and low spatial resolution. Conversely, multispectral images (MSIs) usually have low spectral and h…
Probing phase-space noncommutativity through quantum mechanics and thermodynamics of free particles and quantum rotors
Catarina Bastos, Alex E. Bernardini, Jonas F. G. Santos
Novel quantization properties related to the state vectors and the energy spectrum of a two-dimensional system of free particles are obtained in the framework of noncommutative (NC…
On the Gieseker Harder-Narasimhan filtration for principal bundles
Indranil Biswas, Alfonso Zamora
We give an example of an orthogonal bundle where the Harder-Narasimhan filtration, with respect to Gieseker semistability, of its underlying vector bundle does not correspond to an…
Lattice investigation of heavy meson interactions
Björn Wagenbach, Pedro Bicudo, Marc Wagner
We report on a lattice investigation of heavy meson interactions and of tetraquark candidates with two very heavy quarks. These two quarks are treated in the static limit, while th…
Particle Merging Algorithm for PIC Codes
Marija Vranic, Thomas Grismayer, Joana L. Martins +2
Particle-in-cell merging algorithms aim to resample dynamically the six-dimensional phase space occupied by particles without distorting substantially the physical description of t…
Large scale distribution of ultra high energy cosmic rays detected at the Pierre Auger Observatory with zenith angles up to 80
The Pierre Auger Collaboration
We present the results of an analysis of the large angular scale distribution of the arrival directions of cosmic rays with energy above 4 EeV detected at the Pierre Auger Observat…
Searches for Anisotropies in the Arrival Directions of the Highest Energy Cosmic Rays Detected by the Pierre Auger Observatory
Pierre Auger Collaboration
We analyze the distribution of arrival directions of ultra-high energy cosmic rays recorded at the Pierre Auger Observatory in 10 years of operation. The data set, about three time…
Tomographic-spectral approach for dark matter detection in the cross-correlation between cosmic shear and diffuse gamma-ray emission
Stefano Camera, Mattia Fornasa, Nicolao Fornengo +1
We recently proposed to cross-correlate the diffuse extragalactic gamma-ray background with the gravitational lensing signal of cosmic shear. This represents a novel and promising…
Magnetic Reconnection Onset via Disruption of a Forming Current Sheet by the Tearing Instability
Dmitri A. Uzdensky, Nuno F. Loureiro
The recent realization that Sweet-Parker current sheets are violently unstable to the secondary tearing (plasmoid) instability implies that such current sheets cannot occur in real…
Determination of the octant in LBNO
C. R. Das, Jukka Maalampi, Joao Pulido +1
According to the recent results of the neutrino oscillation experiment MINOS, the neutrino mixing angle may not be maximal (). Two nearly degenerate solutions…
Entanglement and separability in the noncommutative phase-space scenario
Alex E. Bernardini, Catarina Bastos, Orfeu Bertolami +2
Quantumness and separability criteria for continuous variable systems are discussed for the case of a noncommutative (NC) phase-space. In particular, the quantum nature and the ent…
Huygens synchronization of two pendulum clocks
Henrique M. Oliveira, Luís V. Melo
The synchronization of two pendulum clocks hanging from a wall was first observed by Huygens during the XVII century. This type of synchronization is observed in other areas, and i…
High accuracy determination of the U/U fission cross section ratio up to 1 GeV at n_TOF (CERN)
C. Paradela, M. Calviani, D. Tarrío +104
The U to U fission cross section ratio has been determined at n_TOF up to 1 GeV, with two different detection systems, in different geometrical configurations…
Quality-of-Data for Consistency Levels in Geo-replicated Cloud Data Stores
Álvaro García-Recuero, Sérgio Esteves, Luís Veiga
Cloud computing has recently emerged as a key technology to provide individuals and companies with access to remote computing and storage infrastructures. In order to achieve highl…