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    • Impact of Parallel Computing on Study of Time Evolution of a Quantum Impurity System in Response to a Quench
    Authors: Nghiem Thi Minh, Hoa; Dang The Hung, Luong Minh Tuan; Duong Xuan, Nui; Nguyen Duc Trung, Kien;  Advisor: -;  Co-Author: - (2020)

    In an arbitrary system subjected to a quench or an external field that varies the system parameters, the degrees of freedom increase double in comparison to that of an isolated system. In this study, we consider the quantum impurity system subjected to a quench, and measure the corresponding time-evolution of the spectral function, which is originated from the time-resolved photoemission spectroscopy. Due to the large number of degrees of freedom, the expression of the time-dependent spectral function is twice much more complicated than that of the time-independent spectral function, and therefore the calculation is extremely time-consuming. In this paper, we estimate the scale of tim...