Spectral density analysis of time correlation functions in lattice QCD using the maximum entropy method

Spectral density analysis of time correlation functions in lattice QCD using the maximum entropy method
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使用最大熵法对晶格 QCD 中的时间相关函数进行谱密度分析

DOI:
10.1103/physrevd.65.094512
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发表时间:
2002
期刊:
影响因子:
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通讯作者:
H. Fiebig
H. Fiebig
中科院分区:
--
文献类型:
--
作者:
H. Fiebig

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我们研究了利用贝叶斯推理和最大熵方法从晶格QCD的时间关联函数中提取光谱信息的各个方面。重轻介子-介子系统的相关器函数是具有不同统计质量的晶格数据的储存库。重点讨论了从数据中推断出的光谱质量密度函数,以及它们与MEM参数的关系。我们提出用模拟退火法或冷却法来解决贝叶斯推理问题,并讨论了该方法的实际问题。
We study various aspects of extracting spectral information from time correlation functions of lattice QCD by means of Bayesian inference with an entropic prior, the maximum entropy method (MEM). Correlator functions of a heavy-light meson-meson system serve as a repository for lattice data with diverse statistical quality. Attention is given to spectral mass density functions, inferred from the data, and their dependence on the parameters of the MEM. We propose to employ simulated annealing, or cooling, to solve the Bayesian inference problem, and discuss practical issues of the approach.