Transparência eletromagneticamente induzida em diferentes sistemas físicos e seu análogo em osciladores acoplados

• Autor(a) principal: Cabral, Luís Antônio
• Data de Publicação: 2013
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFSCAR
• Texto Completo: https://repositorio.ufscar.br/handle/ufscar/5057
• topic: Ótica quântica; Transparência induzida eletromagneticamente; Osciladores harmônicos; Eletrodinâmica quântica de cavidades; Equivalência clássica; EIT; Electromagnetically induced transparency; EIT; Harmonic oscillators; Cavity quantum electrodynamics; Classical equivalence; CIENCIAS EXATAS E DA TERRA::FISICA

The simultaneously incidence of two light beams on one or more atoms causes destructive interference of these beams in atomic states causing cancellation of the absorption of one of the incident beams and this phenomenon is called Electromagnetically Induced Transparency (EIT). The main objective of this work is to show that the Electromagnetically Induced Transparency, which is usually studied in the quantum context, can be modeled classically as a function of coupled harmonic oscillators subject to an external force and dissipation. To will establish the classical equivalence, it will be presented the theory of the EIT in diferent quantum systems and also the theory of classic harmonic oscillators. Analogies will be performed comparing the classical and quantum equations of motion obtained for each scheme. For this, we perform the equivalence of EIT in quantum systems as atoms in three levels in Λ configuration, two-level atoms plus a cavity mode and the cavity optomechanics with the classical system of two coupled harmonics oscillator forced and damped. We also analyze the equivalence of two diferent quantum systems: three level atoms plus one cavity mode and four levels atoms in free space with a classical system composed by three coupled harmonic oscilators, forced and damped, in diferent configurations.