47 citations · 322 across the 37 of their papers we have counts for
20 papers · 1 filter
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…
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…
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…
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…
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…
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…
Lorentz invariance violation and simultaneous emission of electromagnetic and gravitational waves
E. Passos, M. A. Anacleto, F. A. Brito +3
In this work, we compute some phenomenological bounds for the electromagnetic and massive gravitational high-derivative extensions supposing that it is possible to have an astrophy…
Lifshitz-scaling to Lorentz-violating high derivative operator and gamma-ray busts
E. Passos, E. M. C. Abreu, M. A. Anacleto +3
In this work we have used a Hořava-Lifshitz scaling to rewrite a Lorentz-violating higher-order derivative electrodynamics controlled by a background four-vector . The photon…
Vanishing DC holographic conductivity from a magnetic monopole condensate
Romulo Rougemont, Jorge Noronha, Carlos A. D. Zarro +3
We show how to obtain a vanishing DC conductivity in 3-dimensional strongly coupled QFT's using a massive 2-form field in the bulk that satisfies a special kind of boundary conditi…
Three-dimensional Lorentz-violating action
J. R. Nascimento, A. Yu. Petrov, C. Wotzasek +1
We demonstrate the generation of the three-dimensional Chern-Simons-like Lorentz-breaking ``mixed" quadratic action via an appropriate Lorentz-breaking coupling of vector and scala…
The Chern-Simons term in a dual Josephson junction
L. S. Grigorio, M. S. Guimaraes, R. Rougemont +2
A dual Josephson junction corresponding to a (2+1)-dimensional non-superconducting layer sandwiched between two (3+1)-dimensional dual superconducting regions constitutes a model o…
Massive photons and Dirac monopoles: electric condensate and magnetic confinement
M. S. Guimaraes, R. Rougemont, C. Wotzasek +1
We use the generalized Julia-Toulouse approach (GJTA) for condensation of topological currents (charges or defects) to argue that massive photons can coexist consistently with Dira…
Julia-Toulouse approach to (d+1)-dimensional bosonized Schwinger model with an application to large N QCD
M. S. Guimaraes, R. Rougemont, C. Wotzasek +1
The Julia-Toulouse approach for condensation of charges and defects is used to show that the bosonized Schwinger model can be obtained through a condensation of electric charges in…
The BF theory as an electric Julia-Toulouse condensate
L. S. Grigorio, M. S. Guimaraes, R. Rougemont +2
The Julia-Toulouse mechanism is used to show that the topological Abelian BF term may be induced by the condensation of electric charges. As an application we discuss the subtle qu…
Hořava-Lifshitz Quantum Cosmology
Orfeu Bertolami, Carlos A. D. Zarro
In this work, a minisuperspace model for the projectable Hořava-Lifshitz (HL) gravity without the detailed balance condition is investigated. The Wheeler-deWitt equation is derived…
Stability Conditions For a Noncommutative Scalar Field Coupled to Gravity via the Positive Energy Theorem
Orfeu Bertolami, Carlos A. D. Zarro
The stability requirements for a noncommutative scalar field coupled to gravity is investigated through the positive energy theorem. It is shown that for a noncommutative scalar wi…
Stability Conditions For a Noncommutative Scalar Field Coupled to Gravity
Orfeu Bertolami, Carlos A. D. Zarro
We consider a noncommutative scalar field with a covariantly constant noncommutative parameter in a curved space-time background. For a potential as a noncommutative polynomial it…