298 citations · 949 across the 50 of their papers we have counts for
50 papers
Gravitational Effects on Light Propagation in Linear Magnetoelectrics and Plasmas
Elda Guzmán-Herrera, Vitorio A. De Lorenci, Renato Klippert
A covariant formalism for electromagnetism is used to investigate the effects of light propagation within certain material systems under the influence of a background gravitational…
Macroscopic quantum superpositions in superconducting circuits
Vitoria A. de Souza, Caio C. Holanda Ribeiro, Vitorio A. De Lorenci
A possible route to test whether macroscopic systems can acquire quantum features using superconducting circuits is here presented. It is shown that under general assumptions a cla…
Orbital motion of primordial black holes crossing Solar-type stars
Vitorio A. De Lorenci, David I. Kaiser, Patrick Peter
Primordial black holes (PBHs) are hypothetical objects that could have originated from density fluctuations in a very early phase of our Universe. Recent observations restrict the…
Light propagation in magnetoelectric materials: The role of optical coefficients in refractive index modulation
Vitorio A. De Lorenci, Lucas T. de Paula
Investigations into optical phenomena associated with nonlinear magnetoelectric effects are attracting growing attention within the scientific community. Technologies constantly de…
Modelling the braking "index'' of isolated pulsars
E. C. A. Araujo, V. A. De Lorenci, P. Peter +1
An isolated pulsar is a rotating neutron star possessing a high magnetic dipole moment that generally makes a finite angle with its rotation axis. As a consequence, the emission of…
Quantum Brownian motion of a scalar particle in the presence of a partially reflecting boundary
C. C. H. Ribeiro, V. A. De Lorenci
The second quantization of a real massless scalar field in the presence of a material medium described by a Drude-like susceptibility is here examined in a 1+1 dimensional model. T…
Analog event horizons from magnetoelectric materials
V. A. De Lorenci, L. T. de Paula, C. C. Holanda Ribeiro
Analog models of gravity provide a laboratory setting to investigate curved space phenomena. In this context, linear magnetoelectric materials offer interesting possibilities for m…
Anisotropic motion of an electric dipole in a photon gas near a flat conducting boundary
G. H. S. Camargo, V. A. De Lorenci, A. L. Ferreira Junior +1
The quantum Brownian motion of a single neutral particle with nonzero electric dipole moment placed in a photon gas at fixed temperature and close to a conducting wall is here exam…
Aspects of wave propagation in a nonlinear medium: birefringence and the second-order magnetoelectric coefficients
Vitorio A. De Lorenci
Magnetoelectric materials have the interesting property of exhibiting polarization induced by a magnetic field or magnetization induced by an electric field. As a consequence, a mu…
Probing thermal fluctuations through scalar test particles
G. H. S. Camargo, V. A. De Lorenci, A. L. Ferreira Junior +1
The fundamental vacuum state of quantum fields, related to Minkowski space, produces divergent fluctuations that must be suppressed in order to bring reality to the description of…
Vacuum fluctuations of a scalar field near a reflecting boundary and their effects on the motion of a test particle
G. H. Camargo, V. A. De Lorenci, C. C. H. Ribeiro +2
The contribution from quantum vacuum fluctuations of a real massless scalar field to the motion of a test particle that interacts with the field in the presence of a perfectly refl…
Controlled opacity in a class of nonlinear dielectric media
Eduardo Bittencourt, Guilherme Camargo, Vitorio A. De Lorenci +1
Motivated by new technologies for designing and tailoring metamaterials, we seek properties for certain classes of nonlinear optical materials that allow room for a reversibly cont…
Classical enhancement of quantum vacuum fluctuations
V. A. De Lorenci, L. H. Ford
We propose a mechanism for the enhancement of vacuum fluctuations by means of a classical field. The basic idea is that if an observable quantity depends quadratically upon a quant…
Probing quantum vacuum fluctuations over a charged particle near a reflecting wall
V. A. De Lorenci, C. C. H. Ribeiro, M. M. Silva
We investigate the influence of the vacuum fluctuations of a background electric field over a charged test particle in the presence of a perfectly reflecting flat wall. A switching…
One-way propagation of light in Born-Infeld-like metamaterials
Vitorio A. De Lorenci, Jonas P. Pereira
We propose and investigate a family of nonlinear metamaterials in which light rays propagate just in one direction -- one-way propagation. Furthermore, we argue how such nonlinear…
Decoherence induced by long wavelength gravitons
V. A. De Lorenci, L. H. Ford
We discuss how a background bath of gravitons can induce decoherence of quantum systems. The mechanism is dephasing, the loss of phase coherence due to quantum geometry fluctuation…
Local thermal behaviour of a massive scalar field near a reflecting wall
V. A. De Lorenci, L. G. Gomes, E. S. Moreira
The mean square fluctuation and the expectation value of the stress-energy-momentum tensor of a neutral massive scalar field at finite temperature are determined near an infinite p…
Vacuum Lightcone Fluctuations in a Dielectric
C. H. G. Bessa, V. A. De Lorenci, L. H. Ford +1
A model for observable effects of electromagnetic vacuum fluctuations is presented. The model involves a probe pulse which traverses a slab of nonlinear optical material with a non…
Quantum Brownian motion near a point-like reflecting boundary
V. A. De Lorenci, E. S. Moreira, M. M. Silva
The Brownian motion of a test particle interacting with a quantum scalar field in the presence of a perfectly reflecting boundary is studied in (1 + 1)-dimensional flat spacetime.…
An Analog Model for Light Propagation in Semiclassical Gravity
C. H. G. Bessa, V. A. De Lorenci, L. H. Ford
We treat a model based upon nonlinear optics for the semiclassical gravitational effects of quantum fields upon light propagation. Our model uses a nonlinear material with a nonzer…
Analogue black holes for light rays in static dielectrics
E. Bittencourt, V. A. De Lorenci, R. Klippert +2
Propagation of light in nonlinear materials is here studied in the regime of the geometrical optics. It is shown that a spherically symmetric medium at rest with some specific diel…
Hot scalar radiation setting bounds on the curvature coupling parameter
V. A. De Lorenci, L. G. Gomes, E. S. Moreira
This paper addresses the interplay between vacuum and thermal local averages for massless scalar radiation near a plane wall of a large cavity where the Dirichlet boundary conditio…
Light-cone fluctuations and the renormalized stress tensor of a massless scalar field
V. A. De Lorenci, G. Menezes, N. F. Svaiter
We investigate the effects of light-cone fluctuations over the renormalized vacuum expectation value of the stress-energy tensor of a real massless minimally coupled scalar field d…
An Analog Model for Quantum Lightcone Fluctuations in Nonlinear Optics
L. H. Ford, V. A. De Lorenci, G. Menezes +1
We propose an analog model for quantum gravity effects using nonlinear dielectrics. Fluctuations of the spacetime lightcone are expected in quantum gravity, leading to variations i…