Doppler broadening and squeezing-induced sub- and super-luminal group velocity in a driven qubit model

Autor:	Amjad Hussain, R. A. Alharbey, S. S. Hassan, Hazrat Ali
Rok vydání:	2021
Předmět:	Physics symbols.namesake Qubit Dispersion (optics) Phase (waves) symbols General Physics and Astronomy Group velocity Atomic physics Absorption (electromagnetic radiation) Doppler effect Spectral line Doppler broadening
Zdroj:	The European Physical Journal Plus. 136
ISSN:	2190-5444
Popis:	We investigate the absorption and dispersion spectra of the light pulse propagation through Doppler broadened driven qubit by exponentially weak decaying field in the presence of an off-resonant broadband squeezed vacuum (SV) reservoir. Combined effects of Doppler broadening and SV reservoir parameters induce enhanced sub- and super-luminal behavior of light through the qubit medium, as compared with the normal vacuum (NV) and thermal field (TF) reservoir cases. The SV phase, as a control parameter, induce enhanced sinusoidal (positive and negative) peaks of group index of the Doppler broadened medium.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f46c677d95043adc6aa15938ac83bb84 https://doi.org/10.1140/epjp/s13360-021-01870-6 Zobrazit plný text záznamu Full text from SpringerLink