2011
DOI: 10.1590/s1806-11172011000200006
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Estudo de gases quânticos em uma rede óptica utilizando aproximação variacional

Abstract: Nós investigamos as soluções de uma equação hidrodinâmica de campo médio utilizando aproximações variacionais com o objetivo de estudarmos a formação de gap sóliton iluminado em um gás de bósons e em um gás de férmions degenerado confinados por um potencial transversal e uma rede óptica periódica unidimensional. Através da aproximação variacional nós estudamos a possibilidade de que a não linearidade efetiva para férmions ou coeficiente de interação para bósons atuando em combinação com o potencial de rede ópt… Show more

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“…We can see that, as the depth of the potential increases, the chemical potential decreases through linear behavior. In this adopted interval, the results obtained from the chemical potential µ versus amplitude V 0 showed similar results observed in studies of Bose-Einstein condensates and Superfluid Fermi gases in optical lattices and optical superlattices (doubly periodic and quasiperiodic) [41][42][43][44][45]. Variational and numerical results of chemical potential, µ, versus amplitude, V 0 , of PT potential −V 0 sech 2 (x).…”
Section: Discussionsupporting
confidence: 83%
“…We can see that, as the depth of the potential increases, the chemical potential decreases through linear behavior. In this adopted interval, the results obtained from the chemical potential µ versus amplitude V 0 showed similar results observed in studies of Bose-Einstein condensates and Superfluid Fermi gases in optical lattices and optical superlattices (doubly periodic and quasiperiodic) [41][42][43][44][45]. Variational and numerical results of chemical potential, µ, versus amplitude, V 0 , of PT potential −V 0 sech 2 (x).…”
Section: Discussionsupporting
confidence: 83%