360 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of MinhoPT56 papers
- Universidade do PortoPT36 papers
- University of LisbonPT17 papers
- International Iberian Nanotechnology LaboratoryPT14 papers
- Instituto Superior TécnicoPT13 papers
- QuantaLabPT11 papers
- Centre National de la Recherche ScientifiqueFR10 papers
- Columbia UniversityUS10 papers
- Institució Catalana de Recerca i Estudis AvançatsES10 papers
- University of AveiroPT10 papers
- Beijing Computational Science Research CenterCN9 papers
- Institut des Hautes Études ScientifiquesFR9 papers
84 papers
Theories of gravity with nonminimal matter-curvature coupling and the de Sitter swampland conjectures
Orfeu Bertolami, Cláudio Gomes, Paulo M. Sá
We discuss, in the context of alternative theories of gravity with nonminimal coupling between matter and curvature, if inflationary solutions driven by a single scalar field can b…
From Bloch Oscillations to a Steady-State Current in Strongly Biased Mesoscopic Devices
J. M. Alendouro Pinho, J. P. Santos Pires, Simão M. João +2
It has long been known that quantum particles moving in a periodic lattice and subject to a constant force field undergo an oscillatory motion that is referred to as Bloch Oscillat…
Strongly coupled magnon-plasmon polaritons in graphene- 2D ferromagnet heterostructures
A. T. Costa, M. I. Vasilevskiy, J. Fernández-Rossier +1
Magnons and plasmons are two very different types of collective modes, acting on the spin and charge degrees of freedom, respectively. At first sight, the formation of hybrid plasm…
Electron-mediated entanglement of two distant macroscopic ferromagnets within a nonequilibrium spintronic device
A. Suresh, R. D. Soares, P. Mondal +6
Using the nascent concept of quantum spin-transfer torque [A. Zholud et al., Phys. Rev. Lett. {\bf 119}, 257201 (2017); M. D. Petrović {\em et al.}, Phys. Rev. X {\bf 11}, 021062 (…
Model-based cross-correlation search for gravitational waves from the low-mass X-ray binary Scorpius X-1 in LIGO O3 data
The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1692
We present the results of a model-based search for continuous gravitational waves from the low-mass X-ray binary Scorpius X-1 using LIGO detector data from the third observing run…
Theory of triangulene two-dimensional crystals
R. Ortiz, G. Catarina, J. Fernández-Rossier
Equilateral triangle-shaped graphene nanoislands with a lateral dimension of benzene rings are known as triangulenes. Individual triangulenes are open-shell molecules…
Excitonic instability in transition metal dichalcogenides
M. F. C. Martins Quintela, A. T. Costa, N. M. R. Peres
When transition-metal dichalcogenide monolayers lack inversion symmetry, their low-energy single particle spectrum can described by tilted massive Dirac Hamiltonians. The so-called…
Renormalization-Group Theory of 1D quasiperiodic lattice models with commensurate approximants
Miguel Gonçalves, Bruno Amorim, Eduardo V. Castro +1
We develop a renormalization group (RG) description of the localization properties of onedimensional (1D) quasiperiodic lattice models. The RG flow is induced by increasing the uni…
Multi-field cold and warm inflation and the de Sitter swampland conjectures
Orfeu Bertolami, Paulo M. Sá
We discuss under which conditions multi-field cold and warm inflationary models with canonical kinetic energy terms are compatible with the swampland conjectures about the emergenc…
Anomalous Transport Signatures in Weyl Semimetals with Point Defects
J. P. Santos Pires, Simão M. João, Aires Ferreira +2
We present the first theoretical study of transport properties of Weyl semimetals with point defects. Focusing on a class of time-reversal symmetric Weyl lattice models, we show th…
Nodal vacancy bound states and resonances in three-dimensional Weyl semimetals
J. P. Santos Pires, S. M. João, Aires Ferreira +2
The electronic structure of a cubic -symmetric Weyl semimetal is analysed in the presence of atomic-sized vacancy defects. Isolated vacancies are shown to generate nod…
Quantum kinetic theory of Jeans instability in non-minimal matter-curvature coupling gravity
Cláudio Gomes, Kamel Ourabah
We present a quantum treatment of the Jeans gravitational instability in the Newtonian limit of the non-minimal matter-curvature coupling gravity model. By relying on Wigner functi…
Digital quantum simulation of non-perturbative dynamics of open systems with orthogonal polynomials
José D. Guimarães, Mikhail I. Vasilevskiy, Luís S. Barbosa
Classical non-perturbative simulations of open quantum systems' dynamics face several scalability problems, namely, exponential scaling of the computational effort as a function of…
The Virgo O3 run and the impact of the environment
F. Acernese, M. Agathos, A. Ain +486
Sources of geophysical noise (such as wind, sea waves and earthquakes) or of anthropogenic noise impact ground-based gravitational-wave interferometric detectors, causing transient…
First joint observation by the underground gravitational-wave detector, KAGRA, with GEO600
The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1669
We report the results of the first joint observation of the KAGRA detector with GEO600. KAGRA is a cryogenic and underground gravitational-wave detector consisting of a laser inter…
Tunable Excitons in Rhombohedral Trilayer Graphene
M. F. C. Martins Quintela, N. M. R. Peres
Trilayer graphene is receiving an increasing level of attention due to its stacking--dependent magnetoelectric and optoelectric properties, and its more robust ferromagnetism relat…
Search for gravitational waves from Scorpius X-1 with a hidden Markov model in O3 LIGO data
The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1669
Results are presented for a semi-coherent search for continuous gravitational waves from the low-mass X-ray binary Scorpius X-1, using a hidden Markov model (HMM) to allow for spin…
All-sky search for continuous gravitational waves from isolated neutron stars using Advanced LIGO and Advanced Virgo O3 data
The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1667
We present results of an all-sky search for continuous gravitational waves which can be produced by spinning neutron stars with an asymmetry around their rotation axis, using data…
Tests of General Relativity with GWTC-3
The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1682
The ever-increasing number of detections of gravitational waves (GWs) from compact binaries by the Advanced LIGO and Advanced Virgo detectors allows us to perform ever-more sensiti…
Cassini and extra force constraints to nonminimally coupled gravity with screening mechanism
Riccardo March, Orfeu Bertolami, Marco Muccino +2
We consider a nonminimally coupled curvature-matter gravity theory at the Solar System scale. Both a fifth force of Yukawa type and a further non-Newtonian extra force that arises…
Constraints on the cosmic expansion history from GWTC-3
The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1676
We use 47 gravitational-wave sources from the Third LIGO-Virgo-KAGRA Gravitational-Wave Transient Catalog (GWTC-3) to estimate the Hubble parameter , including its current va…
Searches for Gravitational Waves from Known Pulsars at Two Harmonics in the Second and Third LIGO-Virgo Observing Runs
The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1694
We present a targeted search for continuous gravitational waves (GWs) from 236 pulsars using data from the third observing run of LIGO and Virgo (O3) combined with data from the se…
A template method to measure the polarisation
J. A. Aguilar-Saavedra, M. C. N. Fiolhais, P. Martín-Ramiro +2
We develop a template method for the measurement of the polarisation of pairs produced in hadron collisions. The method would allow to extract the individual fractions o…
Hubbard model for spin-1 Haldane chains
G. Catarina, J. Fernández-Rossier
The Haldane phase for antiferromagnetic spin-1 chains is a celebrated topological state of matter, featuring gapped excitations and fractional spin-1/2 edge states. Here, we provid…