RSS 1.0Instituto de Física Teórica (IFT) - São Paulo
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Morphological characterization and taxonomic key of tadpoles (Amphibia: Anura) from the northern region of the atlantic forest
(Biota Neotropica, 2020) [Artigo]Although anuran tadpoles are widely distributed and abundant in tropical aquatic habitats, there is a lack of taxonomic keys for the Atlantic Forest. Herein, we developed a dichotomous key for identifying the tadpoles for ... -
A pure spinor twistor description of the D = 10 superparticle
Sepúlveda, Diego García
; (Journal of High Energy Physics, 2020) [Artigo]
We present a novel twistor formulation of the ten-dimensional massless super-particle. This formulation is based on the introduction of pure spinor variables through a field redefinition of another model for the superparticle, ... -
The radial tully-fisher relations in dwarf spiral galaxies
; ; Karukes, Ekaterina (Proceedings of the 53rd Rencontres de Moriond on Cosmology 2018, 2020) [Trabalho apresentado em evento]
We present the radial Tully-Fisher relations (hereafter TFR) for a set of 36 dwarf spirals. The Tully-Fisher relation has been widely studied in the past for normal spirals, we here investigate it for galaxies which are ... -
Enhanced near-Infrared Photoresponse from Nanoscale Ag-Au Alloyed Films
; ; Gong, Chen; ; Villegas, Cesar E. P. ; ; ; (ACS Photonics, 2020) [Artigo]
Alloying of metals provides a vast parameter space for tuning of material, chemical, and mechanical properties, impacting disciplines ranging from photonics and catalysis to aerospace. From an optical point-of-view, pure ... -
Fermion mass splitting in the technicolor coupled scenario
; Natale, A. A. (European Physical Journal C, 2020) [Artigo]
We discuss fermion mass generation in unified models where QCD and technicolor (or any two strongly interacting theories) have their Schwinger–Dyson equations coupled. In this case the technicolor (TC) and QCD self-energies ... -
Author Correction: Reconstructing quantum states with generative models (Nature Machine Intelligence, (2019), 1, 3, (155-161), 10.1038/s42256-019-0028-1)
; ; ; Aolita, Leandro (Nature Machine Intelligence, 2019) [Errata]
In the version of this Article originally published, the following sentence in the Acknowledgements was incorrect: ‘Research at Perimeter Institute is supported through Industry Canada and by the Province of Ontario through ... -
Unexpected Behaviors in a Single Mesh Josephson Junction Based Self-Reproducing Autonomous System
; ; Fotso, P. H. Louodop; ; ; (International Journal of Bifurcation and Chaos, 2020) [Artigo]
In the literature, existing Josephson junction based oscillators are mostly driven by external sources. Knowing the different limits of the external driven systems, we propose in this work a new autonomous one that exhibits ... -
First-principles calculation of hot carriers in black phosphorus
; Rocha, Alexandre R. (Journal of Physics: Conference Series, 2020) [Trabalho apresentado em evento]
Black Phosphorus (BP), a layered semiconductor, has atracted enormous attention due to its singular anisotropic electronic, optical and thickness-dependent direct bandgap properties. As a consequence, BP has been envisioned ... -
Pitch networks reveal organizational and spatial patterns of Guardiola's F.C. Barcelona
Herrera-Diestra, J. L.; ; ; ; ; ; (Chaos, Solitons and Fractals, 2020) [Artigo]
We investigated the particular organization of Guardiola's F.C. Barcelona during season 2009/2010, using datasets from the Spanish National League La Liga. Specifically, we constructed the corresponding pitch networks, ... -
Decagon at two loops
; Goncalves, Vasco (Journal of High Energy Physics, 2020) [Artigo]
We have computed the simplest five point function in N = 4 SYM at two loops using the hexagonalization approach to correlation functions. Along the way we have determined all two-particle mirror contributions at two loops ... -
Experimental device-independent certified randomness generation with an instrumental causal structure
; ; Guerini, Leonardo; ; ; ; ; ; (Communications Physics, 2020) [Artigo]
The intrinsic random nature of quantum physics offers novel tools for the generation of random numbers, a central challenge for a plethora of fields. Bell non-local correlations obtained by measurements on entangled states ... -
Epstein-Glaser’s causal light-front field theory
Acevedo, O. A.; Pimentel, B. M. ; (Proceedings of Science, 2019) [Trabalho apresentado em evento]
Epstein-Glaser’s ideas for the formulation of a distributional well-defined perturbative causal field theory are developed in light-front dynamics over the invariant null-plane coordinates introduced by Rohrlich. Explicitly, ... -
Hamilton–Jacobi analysis of the Freidel–Starodubtsev BF (A)dS gravity action
de Gracia, G. B.; Pimentel, B. M. (European Physical Journal Plus, 2020) [Artigo]
In this work, we perform the Hamilton–Jacobi analysis of a modified gravity action, the so-called Freidel–Starodubtsev model. The complete set of involutive Hamiltonians that guarantee the system’s integrability is obtained. ... -
A robust estimate of the Milky Way mass from rotation curve data
Karukes, E. V.; Benito, M. ; Iocco, F. ; ; (Journal of Cosmology and Astroparticle Physics, 2020) [Artigo]
We present a new estimate of the mass of the Milky Way, inferred via a Bayesian approach by making use of tracers of the circular velocity in the disk plane and stars in the stellar halo, as from the publicly available ... -
Problems of the Supergravity Approximation to String Inflation
Năstase, Horaţiu (Fundamental Theories of Physics, 2019) [Capítulo de livro]
Because string theory itself is not very calculable, there are few truly stringy models of cosmology. Therefore, one mostly considers the low energy limit of string theory, supergravity, as an effective field theory, and ... -
String Theory and Particle Physics
Năstase, Horaţiu (Fundamental Theories of Physics, 2019) [Capítulo de livro]
In this next to last chapter of part II of this book, we finally consider how to obtain particle physics from string theory. Indeed, string theory is supposed to describe the real world, and since moreover we want to ... -
Problems of String Inflation
Năstase, Horaţiu (Fundamental Theories of Physics, 2019) [Capítulo de livro]
We now move on to the study of string cosmology, i.e., applications of string theory to cosmology. We have to start, of course, with trying to obtain the most popular cosmological model, inflation. But it turns out that ... -
The KKLMMT Scenario for Inflation and Generalizations
Năstase, Horaţiu (Fundamental Theories of Physics, 2019) [Capítulo de livro]
In the previous chapter, we have shown how KKLT have obtained a de Sitter background in string theory, with a geometry made from branes, cut off in the UV and smoothly joined onto a CY3 half of space, and an antibrane at ... -
N= 1 Supergravity in 4 Dimensions
Năstase, Horaţiu (Fundamental Theories of Physics, 2019) [Capítulo de livro]
In this chapter we will study N= 1 supergravity in 4 dimensions. Supergravity can be defined as a supersymmetric theory of gravity, or otherwise as a theory of local supersymmetry. In practice, we will use a bit of both ... -
Slow-Roll Inflation
Năstase, Horaţiu (Fundamental Theories of Physics, 2019) [Capítulo de livro]
In this chapter we will explore the simplest incarnation of inflation, namely the inflation with a scalar field that gives an approximate cosmological constant. We will see that we can quantify the condition into what is ...