8 papers
Optical forces on an oscillating dipole near VO phase transition
Daniela Szilard, Patrícia P. Abrantes, Felipe A. Pinheiro +3
We investigate optical forces on oscillating dipoles close to a phase-change vanadium dioxide (VO) film, which exhibits a metal-insulator transition around K and low ther…
Probing topological phase transitions via quantum reflection in the graphene family materials
P. P. Abrantes, Tarik P. Cysne, D. Szilard +3
We theoretically investigate the quantum reflection of different atoms by two-dimensional (2D) materials of the graphene family (silicene, germanene, and stanene), subjected to an…
Tuning resonance energy transfer with magneto-optical properties of graphene
P. P. Abrantes, G. Bastos, D. Szilard +2
We investigate the resonance energy transfer (RET) rate between two quantum emitters near a suspended graphene sheet in vacuum under the influence of an external magnetic field. We…
Negative refraction in the relativistic electron gas
C. A. A. de Carvalho, D. M. Reis, D. Szilard
We show that a gas of relativistic electrons is a left-handed material at low frequencies by computing the effective electric permittivity and effective magnetic permeability that…
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…
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…