186 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Universidade Federal do ParanáBR20 papers
- Universidade Tecnológica Federal do ParanáBR15 papers
- Universidade Federal do Espírito SantoBR13 papers
- Universidade Estadual de LondrinaBR12 papers
- Instituto Nacional de Pesquisas EspaciaisBR7 papers
- Universidade de São PauloBR7 papers
- Shahid Beheshti UniversityIR6 papers
- Universidade de BrasíliaBR6 papers
- Universidade Federal do Rio Grande do SulBR5 papers
- Universitat de BarcelonaES5 papers
- Fundação Parque Tecnológico ItaipuBR4 papers
- Universidade Federal de Campina GrandeBR4 papers
76 papers
Probing Lorentz Invariance Violation in Cosmogenic Neutrino Propagation with KM3-230213A
Rodrigo Sasse, Rodrigo Guedes Lang, Rita de Cássia dos Anjos
We investigate superluminal Lorentz invariance violation (LIV) in the neutrino sector using cosmogenic neutrino fluxes generated with ultrahigh-energy cosmic-ray propagation models…
Hadronic origin of gamma rays and neutrinos from blazars: Multi-messenger implications and observational constraints
Rodrigo Sasse, Rita de Cássia dos Anjos
We investigate whether cosmogenic gamma rays and neutrinos from ultra-high-energy cosmic rays (UHECRs) produced in hadronically active blazars can significantly contribute to the o…
Non-thermal emission from the vicinity of the magnetar CXOU J171405.7-381031
Manoel F. Sousa, Rita. C. Anjos
Magnetars are neutron stars with ultra-strong magnetic fields (- G) and are promising candidates for high-energy particle acceleration. We present a multiw…
Multiwavelength study of non-thermal emission in the Swift J1834.9-0846/W41 region
Manoel F. Sousa, Rita C. Dos Anjos, Vitor de Souza
We investigate the origin of non-thermal emission from the Swift J1834-0846/W41 region by modeling its broadband spectral energy distribution from radio to TeV energies within lept…
Generalized Fourier's law in mesoscopic systems
Luciano C. Lapas
Fourier's law fails when the mean free path of the energy carriers becomes comparable to the length and time scales over which the temperature field varies. We derive a thermodynam…
Tuning ergodicity breaking: Anomalous diffusion under asymptotic power-law forcing
Raul V. B. Morás, M. Florencia Carusela, Luciano C. Lapas
In non-Markovian systems, distinct dynamical phases arise from the competition between internal memory and external forcing, encompassing thermalization, persistent ergodicity brea…
High-Synchrotron-Peaked BL Lacs as Multi-Messenger Sources: Connecting Ultra-High-Energy Cosmic Rays and Neutrinos
Luiz Augusto Stuani Pereira, Rita C. Anjos
High-synchrotron-peaked (HSP) BL Lac objects are extreme particle accelerators whose synchrotron emission peaks at high frequencies, typically in the UV-to-X-ray band ($ν_{\rm peak…
Oblique Shocks at Supernova Remnants in Massive Star Clusters: A Model for the Cosmic-Ray Knee Observed by LHAASO
Luana N. Padilha, Rita C. Anjos
This work establishes oblique shocks in Massive Star Clusters (MSC) as a primary mechanism for accelerating cosmic rays (CR) up to the knee of the energy spectrum. We develop a mod…
Energy Deposition by Galactic Cosmic Rays and Implications for Ozone Chemistry
Luiz Augusto Stuani Pereira, Rita C. Anjos
We present a Monte Carlo study of galactic cosmic-ray (GCR) energy deposition and its implications for stratospheric chemistry, performed with the Geant4 toolkit. Primary nuclei (p…
Statistical consistency of sign-switching vacuum energy with cosmological observations
Sehjal Khandelwal, Abraão J. S. Capistrano, Suresh Kumar
We assess dataset agreement and late-time predictive adequacy in CDM and its sign-switching extension, CDM, using a suite of Gaussian and exact non-Gaussian consisten…
Probing dynamical dark energy with late-time data: Evidence, tensions, and the limits of the CDM framework
Tengpeng Xu, Suresh Kumar, Yun Chen +2
We test the dynamical dark-energy CDM (CPL) framework against CDM using CMB anisotropies and lensing together with DESI DR2, SDSS-IV, transverse/angular BAO (BAOtr), and…
Probing dynamical embeddings in a five-dimensional spacetime in light of DESI BAO
Abraão J. S. Capistrano, Emanuelly Silva, Rafael C. Nunes +1
We here investigate the observational viability of Nash gravity as an alternative to the standard CDM cosmology. Based on Nash's embedding theorem, the model introduces orthogon…
Massive Star Clusters as sources of high-energy gamma radiation
Luana N. Padilha, Rita C. Anjos
This paper investigates the contribution of massive star clusters (MSC) as sources of high-energy gamma rays and their impact on the ultra-high-energy (UHE) emission observed throu…
UHECRs Propagation and their Multimessengers: Upper limits and the Impact of the Extragalactic Magnetic Field
Rodrigo Sasse, Rubens Costa, Adriel G. B Mocellin +2
The detection of high-energy astrophysical multimessengers establishes a connection between ultra-high-energy cosmic rays (UHECRs) and powerful cosmic accelerators. Interactions of…
Droplet rebounds off a fluid bath at low Weber numbers
Elvis A. Agüero, Carlos A. Galeano-Rios, Clodoaldo Ragazzo +3
We present a method to simulate non-coalescing impacts and rebounds of droplets onto the free surface of a liquid bath, together with new experimental data, focused on the low-spee…
Quantum circuit evolutionary framework applied on set partitioning problem
Bruno Oziel Fernandez, Rodrigo Bloot, Marcelo Moret
Quantum algorithms are of great interest for their possible use in optimization problems. In particular, variational algorithms that use classical counterparts to optimize paramete…
Impact of unitarity violation on sensitivity of the leptonic CP phase at Hyper-Kamiokande and DUNE
Ana Maria Garcia Trzeciak, Hiroshi Nunokawa, Alexander Arguello Quiroga
We study the impact of unitarity violation on the sensitivity of the leptonic CP phase, , considering the next generation of long-baseline neutrino experiments, Hyper-Kamio…
Blazars Jets and prospects for TeV-PeV neutrinos & gamma-rays through cosmic-ray interactions
Rodrigo Sasse, Rubens Jr. Costa, Luiz A. Stuani Pereira +1
This study explores the origins of cosmic rays and their secondary messengers, focusing on the potential role of four BL Lacs W Comae, 1ES 1959+650, PKS 2005-489, and PKS 2155-304…
Unraveling Rodeo Algorithm Through the Zeeman Model
Raphael Fortes Infante Gomes, Julio Cesar Siqueira Rocha, Wallon Anderson Tadaiesky Nogueira +1
We unravel the Rodeo Algorithm to determine the eigenstates and eigenvalues spectrum for a general Hamiltonian considering arbitrary initial states. By presenting a novel methodolo…
Unraveling the Spin-to-Charge Current Conversion Mechanism and Charge Transfer Dynamics at Interface of Graphene/WS Heterostructures at Room Temperature
Rafael O. Cunha, Yunier Garcia-Basabe, Dunieskys G. Larrude +7
We report experimental investigations of spin-to-charge current conversion and charge transfer dynamics (CT) at the interface of graphene/WS van der Waals heterostructure. Pure…
Lower tensor-to-scalar ratio as possible signature of modified gravity
Abraão J. S. Capistrano, Rafael C. Nunes, Luís A. Cabral
This paper simplifies the induced four-dimensional gravitational equations originating from a five-dimensional bulk within the framework of Nash's embeddings, incorporating them in…
The Fluctuation-Dissipation Relations: Growth, Diffusion, and Beyond
Márcio Sampaio Gomes-Filho, Luciano Calheiros Lapas, Ewa Gudowska-Nowak +1
In this review, we scrutinize historical and modern results on the linear response of dynamical systems to external perturbations with a particular emphasis on the celebrated relat…
Estimating the Number of States via the Rodeo Algorithm for Quantum Computation
Julio Cesar Siqueira Rocha, Raphael Fortes Infante Gomes, Wallon Anderson Tadaiesky Nogueira +1
In the realm of statistical physics, the number of states in which a system can be realized with a given energy is a key concept that bridges the microscopic and macroscopic descri…
A gamma-ray study of galactic PeVatron candidates LHAASO J1825-1326 and LHAASO J1839-0545
Rubens Jr. Costa, Débora B. Götz, Rita C. Anjos +2
Recent studies by LHAASO have shown the presence of high-luminosity PeVatrons in our Galaxy. We examine two notable sources, each consisting of two pulsars, detected by LHAASO. We…