47 citations · 322 across the 37 of their papers we have counts for
37 papers
Zero Temperature, Degenerate Fermion Stars
S. Boatto, M. B. Paranjape, V. Pessanha +1
We study a zero temperature, degenerate, fermion gas with fermions of rest mass , that only interacts with itself, gravitationally. We describe a self-consistent novel approach…
Field quantization in rotating frames: coordinate covariance and the circular-detector response
Sidney Natzuka Junior, Carlos Augusto Domingues Zarro, Matheus dos Santos Soares
We provide a unified analysis of scalar-field quantization and detector response in relativistic rotating frames, comparing rigid and Trocheris-Takeno (TT) descriptions in unbounde…
Quantum Scattering in Schwarzschild Spacetime: Hawking Radiation and Black Hole Atmospheres
Victor H. Alencar, Gabriel Picanço, Carlos A. D. Zarro
In this paper, we investigate scattering of a scalar field near a Schwarzschild black hole through its -matrix. Within this framework, we obtain a novel derivation of Hawking ra…
Limits on the Carroll-Field-Jackiw electrodynamics from geomagnetic data
G. F. de Carvalho, M. Fillion, P. C. Malta +1
Lorentz-symmetry violation may be described via the CPT-odd, dimension-3, Carroll-Field-Jackiw term, which couples the electromagnetic fields to a constant 4-vector se…
Experimental signatures of Kalb-Ramond-like particles
P. C. Malta, J. P. S. Melo, C. A. D. Zarro
We analyse phenomenological signatures of Kalb-Ramond-like particles, described by an antisymmetric rank-2 tensor, when coupled to fermionic matter. The latter is modelled by a ten…
Dispersive interaction between two atoms in Proca Quantum Electrodynamics
Gabriel Camacho de Pinho, Carlos Augusto Domingues Zarro, Carlos Farina +2
We analyze the influence of a massive photon in the dispersive interaction between two atoms in their fundamental states. We work in the context of Proca Quantum Electrodynamics. T…
Bounds on the photon mass via the Shapiro effect in the solar system
P. C. Malta, C. A. D. Zarro
We study the effects of a finite mass for the photon on its propagation in a weak gravitational field. In particular, we analyse the gravitational time delay, also known as the Sha…
Bosonic and Fermionic Holographic Fluctuation and Dissipation at finite temperature and density
Nathan G. Caldeira, Carlos A. D. Zarro, Henrique Boschi-Filho
In this paper we investigate some general aspects of fluctuation and dissipation in the holographic scenario at zero and finite density. We model this situation with a probe string…
Two-photon spontaneous emission of an atom in a cosmic string background
Lucas Weitzel, Y. Muniz, C. Farina +1
It is well known that the vicinities of an atomic system may substantially affect its radiative properties. In this work, we consider the influence of a cosmic string background in…
Fermionic and bosonic fluctuation-dissipation theorem from a deformed AdS holographic model at finite temperature and chemical potential
Nathan G. Caldeira, Eduardo Folco Capossoli, Carlos A. D. Zarro +1
In this work we study fluctuations and dissipation of a string in a deformed anti-de Sitter (AdS) space at finite temperature and density. The deformed AdS space is a charged black…
Fluctuation and dissipation within a deformed holographic model with backreaction
Nathan G. Caldeira, Eduardo Folco Capossoli, Carlos A. D. Zarro +1
In this work we study the fluctuation and dissipation of a string attached to a brane in a deformed and backreated AdS-Schwarzschild spacetime. This space is a solution of Einstein…
Uniformly accelerated quantum counting detector in Minkowski and Fulling vacuum states
M. S. Soares, N. F. Svaiter, C. A. D. Zarro +1
In this work we discuss the process of measurements by a detector in an uniformly accelerated rectilinear motion, interacting linearly with a massive scalar field. The detector mod…
Fluctuation and Dissipation from a Deformed String/Gauge Duality Model
Nathan G. Caldeira, Eduardo Folco Capossoli, Carlos A. D. Zarro +1
Using a Lorentz invariant deformed string/gauge duality model at finite temperature we calculate the thermal fluctuation and the corresponding linear response, verifying the fluctu…
Functional equations for regularized zeta-functions and diffusion processes
Alexis Saldivar, Nami F. Svaiter, Carlos A. D. Zarro
We discuss modifications in the integral representation of the Riemann zeta-function that lead to generalizations of the Riemann functional equation that preserves the symmetry $s\…
A time-dependent harmonic oscillator with two frequency jumps: an exact algebraic solution
D. M. Tibaduiza, L. Pires, A. L. C. Rego +3
We consider a harmonic oscillator (HO) with a time dependent frequency which undergoes two successive abrupt changes. By assumption, the HO starts in its fundamental state with fre…
Radiative Processes of Entangled Detectors in Rotating Frames
Gabriel Picanço Costa, Nami Fux Svaiter, Carlos Augusto Domingues Zarro
We investigate the radiative processes of accelerated entangled two-level systems. Using first-order perturbation theory, we evaluate transition rates of two entangled Unruh-DeWitt…
Multiplicative Noise in Euclidean Schwarzschild Manifold
M. S. Soares, N. F. Svaiter, C. A. D. Zarro
We discuss a scalar field model defined in the Euclidean section of the Schwarzschild solution of the Einstein equations in the presence of multiplicative noise. Th…
Efficient algebraic solution for a time-dependent quantum harmonic oscillator
D. M. Tibaduiza, L. B. Pires, D. Szilard +3
Using operator ordering techniques based on BCH-like relations of the su(1,1) Lie algebra and a time-splitting approach,we present an alternative method of solving the dynamics of…
Disordered Bose-Einstein condensate in hard walls trap
R. Acosta-Diaz, C. A. D. Zarro, G. Krein +2
We discuss the effects of quenched disorder in a dilute Bose-Einstein condensate confined in a hard walls trap. Starting from the disordered Gross-Pitaevskii functional, we obtain…
Disordered Landau-Ginzburg model
R. Acosta Diaz, G. Krein, N. F. Svaiter +1
We discuss a disordered Landau-Ginzburg model defined in a d-dimensional space. First we adopt the standard procedure of averaging the disorder dependent free energ…
Bubble nucleation in disordered Landau-Ginzburg model
R. Acosta Diaz, N. F. Svaiter, C. A. D. Zarro
In this paper we investigate bubble nucleation in a disordered Landau-Ginzburg model. First we adopt the standard procedure to average over the disordered free energy. This quantit…
Entanglement dynamics in random media
G. Menezes, N. F. Svaiter, C. A. D. Zarro
We study how the entanglement dynamics between two-level atoms is impacted by random fluctuations of the light cone. In our model the two-atom system is envisaged as an open system…
Spontaneous symmetry breaking in replica field theory
R. Acosta Diaz, G. Menezes, N. F. Svaiter +1
In this paper we discuss a disordered -dimensional Euclidean model. The dominant contribution to the average free energy of this system is written as a series of the re…
The Fermi problem in disordered systems
G. Menezes, N. F. Svaiter, H. R. de Mello +1
We revisit the Fermi two-atoms problem in the framework of disordered systems. In our model we consider a two-qubits system linearly coupled with a quantum massless scalar field. W…