Zobrazeno 1 - 10
of 261
pro vyhledávání: '"Alves, Danilo"'
Recently, it has been shown that, under the action of the lateral van der Waals (vdW) force due to a perfectly conducting corrugated plane, a neutral anisotropic polarizable particle in vacuum can be attracted not only to the nearest corrugation peak
Externí odkaz:
http://arxiv.org/abs/2411.16717
In quantum mechanics courses, students often solve the Schr\"odinger equation for the harmonic oscillator with time-independent parameters. However, time-dependent quantum harmonic oscillators are relevant in modeling several problems as, for instanc
Externí odkaz:
http://arxiv.org/abs/2411.12894
In ``The Feynman Lectures on Physics'' is discussed an introduction to tensors by means of the polarization tensor, including a way of ``visualizing'' this tensor via the energy ellipsoid, which is drawn by the electric fields which produce the same
Externí odkaz:
http://arxiv.org/abs/2407.18464
Autor:
Alves, Danilo T.
The creation of particles by the excitation of the quantum vacuum in a cavity with a moving mirror was predicted in 1969. Here, we investigate that, in addition to real particles, the excitation of the quantum vacuum in a dynamical cavity can also re
Externí odkaz:
http://arxiv.org/abs/2405.10409
The papers by Janszky and Adam [Phys. Rev. A {\bf 46}, 6091 (1992)] and Chen \textit{et al.} [Phys. Rev. Lett. {\bf 104}, 063002 (2010)] are examples of works where one can find the following equivalences: belonging to the following class: quantum ha
Externí odkaz:
http://arxiv.org/abs/2306.05577
Autor:
Braga, Alessandra N., Pires, Wagner P., Silva, Jeferson Danilo L., Alves, Danilo T., Alves, Van Sérgio
We investigate how the renormalization of the band gap in a planar 2D material is affected by the consideration of two nondispersive semi-infinite dielectrics, with dielectric constants $\epsilon_1$ and $\epsilon_2$, separated by a planar interface.
Externí odkaz:
http://arxiv.org/abs/2306.04759
Publikováno v:
Entropy 2022, 24(12), 1851
Harmonic oscillators with multiple abrupt jumps in their frequencies have been investigated by several authors during the last decades. We investigate the dynamics of a quantum harmonic oscillator with initial frequency $\omega_0$, that undergoes a s
Externí odkaz:
http://arxiv.org/abs/2211.06756
We investigate the lateral van der Waals (vdW) force between an anisotropic polarizable particle and a perfectly conducting plane with a hemispherical protuberance with radius $R$. We predict, via an exact calculation, a sign inversion in the lateral
Externí odkaz:
http://arxiv.org/abs/2209.00547
In one of his books [$\textit{The Feynmann Lectures on Physics}$, vol. 2], Feynman presents a didactic approach to introduce basic ideas about tensors, using, as a first example, the dependence of the induced polarization of a crystal on the directio
Externí odkaz:
http://arxiv.org/abs/2207.01713
We consider a perfectly conducting infinite cylinder with radius $R$, and investigate the Casimir-Polder (CP) and van der Waals (vdW) interactions with a neutral polarizable particle constrained to move in a plane distant $x_0>R$ from the axis of the
Externí odkaz:
http://arxiv.org/abs/2207.01671