RQC Seminar

39th RQC Seminar

  • 講演者

    Mr. Yi-Te Huang
    (National Cheng Kung University, Taiwan）

  • 日程

    2023年4月12日（水）16:00-17:00（JST）

  • 開催場所

    オンサイト（研究本館4階 会議室(435-437)）

  • 講演タイトル

    An efficient Julia framework for hierarchical equations of motion in open quantum systems

  • お問合せ

    rqc_info[at]ml.riken.jp

講演概要
We introduce an open-source software package called "Heom.jl", a Julia framework to integrate the hierarchical equations of motion (HEOM) for the reduced dynamics of a system simultaneously coupled to multiple bosonic and fermionic environments. Heom.jl features a collection of methods to compute bosonic and fermionic spectra, stationary states, and the full dynamics in the extended space of all auxiliary density operators (ADOs). The required handling of the ADOs multi-indexes is achieved through a user-friendly interface. We exemplify the functionalities of the package by analyzing a single impurity interacting with two fermionic reservoirs (Anderson model), and an ultra-strongly coupled charge-cavity system interacting with one bosonic and two fermionic reservoirs. Heom.jl allows for an order of magnitude speedup in the construction of the HEOM Liouvillian superoperator, solving dynamics and stationary states for all ADOs with respect to the corresponding method in the Quantum Toolbox in Python (QuTiP), upon which this package is founded.


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