Doutorado em Física (IF)
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Navegando Doutorado em Física (IF) por Autor "Carrijo, Thiago Mureebe"
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Item Incerteza quântica local em transições de fase quânticas e uma generalização para sistemas multipartidos(Universidade Federal de Goiás, 2018-05-02) Carrijo, Thiago Mureebe; Céleri, Lucas Chibebe; http://lattes.cnpq.br/6630683190018665; Avelar, Ardiley Torres; http://lattes.cnpq.br/5732286631137637; Almeida, Agnaldo Rosa de; Avelar, Ardiley Torres; Valverde, Clodoaldo; Oliveira, Guilherme Colherinhas de; Cardoso, Wesley BuenoIn this work, we have studied how local quantum uncertainty (LQU) and linear entropy behave in critical systems. Two models of spin 1/2 systems were investigated: XY and XY with triple interaction (XYT), both unidimensional. It was concluded that these measures and their derivatives locate the phase transitions of these systems and a justification was given for the difference of behavior between the LQU and the linear entropy in the region near the transition in the XY model. A measure of multipartite quantum correlations was also created according to a set of axiomatic criteria, which was tested in the family of Werner-GHZ quantum states, producing results in accordance with the expected result, according to the literature.