18.1k citations
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
181 papers · 1 filter
Emergence of Spatial Order in Highly Interacting Rydberg Gases
João D. Rodrigues, Hugo Terças, Luis F. Gonçalves +2
We describe the emergence of strong spatial correlations, akin to liquid-like behavior and crystallization effects, in low (one and two) dimensional gases of cold Rydberg atoms. Th…
The ESO's VLT Type Ia supernova spectral set of the final two years of SNLS
C. Balland, F. Cellier-Holzem, C. Lidman +24
We aim to present 70 spectra of 68 new high-redshift type Ia supernovae (SNeIa) measured at ESO's VLT during the final two years of operation (2006-2008) of the Supernova Legacy Su…
Valley polarized magnetic state in hole-doped mono layers of transition metal dichalcogenides
João E. H. Braz, B. Amorim, Eduardo V. Castro
We compute the valley/magnetic phase diagram of mono layers of transition metal dichalcogenides in the hole doped region where spin-orbit effects are particularly relevant. Taking…
Link between the photonic and electronic topological phases in artificial graphene
Sylvain Lannebère, Mário G. Silveirinha
In recent years the study of topological phases of matter has emerged as a very exciting field of research, both in photonics and in electronics. However, up to now the electronic…
Studying the Ultraviolet Spectrum of the First Spectroscopically Confirmed Supernova at redshift two
M. Smith, M. Sullivan, R. C. Nichol +87
We present observations of DES16C2nm, the first spectroscopically confirmed hydrogen-free superluminous supernova (SLSN-I) at redshift z~2. DES16C2nm was discovered by the Dark Ene…
Black hole horizons can hide positive heat capacity
Tamás S. Biró, Viktor G. Czinner, Hideo Iguchi +1
Regarding the volume as independent thermodynamic variable we point out that black hole horizons can hide positive heat capacity and specific heat. Such horizons are mechanically m…
Impact of complex adatom-induced interactions on quantum spin Hall phases
Flaviano Jose dos Santos, Dario A. Bahamon, Roberto B. Muniz +4
Adsorbate engineering offers a seemingly simple approach to tailor spin-orbit interactions in atomically thin materials and thus to unlock the much sought-after topological insulat…
MARTA: A high-energy cosmic-ray detector concept with high-accuracy muon measurement
P. Abreu, S. Andringa, P. Assis +42
A new concept for the direct measurement of muons in air showers is presented. The concept is based on resistive plate chambers (RPCs), which can directly measure muons with very g…
Spinning particles in general relativity: Momentum-velocity relation for the Mathisson-Pirani spin condition
L. Filipe O. Costa, Georgios Lukes-Gerakopoulos, Oldřich Semerák
The Mathisson-Papapetrou-Dixon (MPD) equations, providing the "pole-dipole" description of spinning test particles in general relativity, have to be supplemented by a condition spe…
Rotating elastic string loops in flat and black hole spacetimes: stability, cosmic censorship and the Penrose process
Jose Natario, Leonel Queimada, Rodrigo Vicente
We rederive the equations of motion for relativistic strings, that is, one-dimensional elastic bodies whose internal energy depends only on their stretching, and use them to study…
Lepton mixing and the charged-lepton mass ratios
D. Jurciukonis, L. Lavoura
We construct a class of renormalizable models for lepton mixing that generate predictions given in terms of the charged-lepton mass ratios. We show that one of those models leads,…
Black hole mass formula in the membrane paradigm
José P. S. Lemos, Oleg B. Zaslavskii
The membrane paradigm approach adopts a timelike surface, stretched out off the null event horizon, to study several important black hole properties. We use this powerful tool to g…
Dynamical systems applied to cosmology: dark energy and modified gravity
Sebastian Bahamonde, Christian G. Boehmer, Sante Carloni +3
The Nobel Prize winning confirmation in 1998 of the accelerated expansion of our Universe put into sharp focus the need of a consistent theoretical model to explain the origin of t…
Fermion Masses and Mixings and Dark Matter Constraints in a Model with Radiative Seesaw Mechanism
Nicolás Bernal, A. E. Cárcamo Hernández, Ivo de Medeiros Varzielas +1
We formulate a predictive model of fermion masses and mixings based on a family symmetry. In the quark sector the model leads to the viable mixing inspired texture where th…
Radiative neutrino masses from order-4 CP symmetry
Igor P. Ivanov
Generalized CP symmetry of order 4 (CP4) is surprisingly powerful in shaping scalar and quark sectors of multi-Higgs models. Here, we extend this framework to the neutrino sector.…
Dynamical phase transitions at finite temperature from fidelity and interferometric Loschmidt echo induced metrics
Bruno Mera, Chrysoula Vlachou, Nikola Paunković +2
We study finite-temperature Dynamical Quantum Phase Transitions (DQPTs) by means of the fidelity and the interferometric Loschmidt Echo (LE) induced metrics. We analyse the associa…
Solving the relativistic inverse stellar problem through gravitational waves observation of binary neutron stars
Tiziano Abdelsalhin, Andrea Maselli, Valeria Ferrari
The LIGO/Virgo collaboration has recently announced the direct detection of gravitational waves emitted in the coalescence of a neutron star binary. This discovery allows, for the…
Language Bootstrapping: Learning Word Meanings From Perception-Action Association
Giampiero Salvi, Luis Montesano, Alexandre Bernardino +1
We address the problem of bootstrapping language acquisition for an artificial system similarly to what is observed in experiments with human infants. Our method works by associati…
The C2HDM revisited
Duarte Fontes, Margarete Mühlleitner, Jorge C. Romão +3
The complex two-Higgs doublet model is one of the simplest ways to extend the scalar sector of the Standard Model to include a new source of CP-violation. The model has been used a…
Tetraquark resonances computed with static lattice QCD potentials and scattering theory
Pedro Bicudo, Marco Cardoso, Antje Peters +2
We study tetraquark resonances with lattice QCD potentials computed for two static quarks and two dynamical quarks, the Born-Oppenheimer approximation and the emergent wave method…
Spontaneous lateral atomic recoil force close to a photonic topological material
S. Ali Hassani Gangaraj, George W. Hanson, Mauro Antezza +1
We investigate the quantum recoil force acting on an excited atom close to the surface of a nonreciprocal photonic topological insulator (PTI). The main atomic emission channel is…
Quasinormal modes of black holes in Einstein-power-Maxwell theory
Grigoris Panotopoulos, Angel Rincon
In the present work we compute the spectrum of quasinormal frequencies of four-dimensional charged black holes in Einstein-power-Maxwell theory. In particular we study scalar pertu…
Search for High-energy Neutrinos from Binary Neutron Star Merger GW170817 with ANTARES, IceCube, and the Pierre Auger Observatory
A. Albert, M. Andre, M. Anghinolfi +1931
The Advanced LIGO and Advanced Virgo observatories recently discovered gravitational waves from a binary neutron star inspiral. A short gamma-ray burst (GRB) that followed the merg…
Quantum contract signing with entangled pairs
P. Yadav, P. Mateus, N. Paunković +1
We present a quantum scheme for signing contracts between two clients (Alice and Bob) using entangled states and the services of a third trusted party (Trent). The trusted party is…