Staff View: Impact of Parallel Computing on Study of Time Evolution of a Quantum Impurity System in Response to a Quench

Impact of Parallel Computing on Study of Time Evolution of a Quantum Impurity System in Response to a Quench

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-ev...

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Main Authors:	Nghiem Thi Minh, Hoa, Dang The Hung, Luong Minh Tuan, Duong Xuan, Nui, Nguyen Duc Trung, Kien
Format:	Article
Language:	English
Published:	Đại học Quốc gia Việt Nam 2020
Subjects:	Quantum impurity system time-dependent spectral function degrees of freedom parallel computing OpenMP GPU
Online Access:	https://dlib.phenikaa-uni.edu.vn/handle/PNK/396 https://doi.org/10.25073/2588-1124/vnumap.4453
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spelling	oai:localhost:PNK-3962022-08-17T05:54:38Z Impact of Parallel Computing on Study of Time Evolution of a Quantum Impurity System in Response to a Quench Nghiem Thi Minh, Hoa Dang The Hung, Luong Minh Tuan Duong Xuan, Nui Nguyen Duc Trung, Kien Quantum impurity system time-dependent spectral function degrees of freedom parallel computing OpenMP GPU 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 time consumption of such calculation in comparison to that of time-independent calculation, and present our solution to the problem by using parallel computing as implementing both MPI and OpenMP to the calculation. We also discuss the possibility to exploit parallel computing with GPU in the near future, and the preliminary results of time-dependent spectral function. 2020-06-18T03:09:01Z 2020-06-18T03:09:01Z 2020 Article Working Paper https://dlib.phenikaa-uni.edu.vn/handle/PNK/396 https://doi.org/10.25073/2588-1124/vnumap.4453 en application/pdf Đại học Quốc gia Việt Nam
institution	Digital Phenikaa
collection	Digital Phenikaa
language	English
topic	Quantum impurity system time-dependent spectral function degrees of freedom parallel computing OpenMP GPU
spellingShingle	Quantum impurity system time-dependent spectral function degrees of freedom parallel computing OpenMP GPU Nghiem Thi Minh, Hoa Dang The Hung, Luong Minh Tuan Duong Xuan, Nui Nguyen Duc Trung, Kien Impact of Parallel Computing on Study of Time Evolution of a Quantum Impurity System in Response to a Quench
description	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 time consumption of such calculation in comparison to that of time-independent calculation, and present our solution to the problem by using parallel computing as implementing both MPI and OpenMP to the calculation. We also discuss the possibility to exploit parallel computing with GPU in the near future, and the preliminary results of time-dependent spectral function.
format	Article
author	Nghiem Thi Minh, Hoa Dang The Hung, Luong Minh Tuan Duong Xuan, Nui Nguyen Duc Trung, Kien
author_facet	Nghiem Thi Minh, Hoa Dang The Hung, Luong Minh Tuan Duong Xuan, Nui Nguyen Duc Trung, Kien
author_sort	Nghiem Thi Minh, Hoa
title	Impact of Parallel Computing on Study of Time Evolution of a Quantum Impurity System in Response to a Quench
title_short	Impact of Parallel Computing on Study of Time Evolution of a Quantum Impurity System in Response to a Quench
title_full	Impact of Parallel Computing on Study of Time Evolution of a Quantum Impurity System in Response to a Quench
title_fullStr	Impact of Parallel Computing on Study of Time Evolution of a Quantum Impurity System in Response to a Quench
title_full_unstemmed	Impact of Parallel Computing on Study of Time Evolution of a Quantum Impurity System in Response to a Quench
title_sort	impact of parallel computing on study of time evolution of a quantum impurity system in response to a quench
publisher	Đại học Quốc gia Việt Nam
publishDate	2020
url	https://dlib.phenikaa-uni.edu.vn/handle/PNK/396 https://doi.org/10.25073/2588-1124/vnumap.4453
_version_	1751856271318843392
score	8.891053

Impact of Parallel Computing on Study of Time Evolution of a Quantum Impurity System in Response to a Quench

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