From Complex to Stochastic Potential: Heavy Quarkonia in the Quark-Gluon Plasma
From Complex to Stochastic Potential: Heavy Quarkonia in the Quark-Gluon Plasma
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从复杂势到随机势：夸克-胶子等离子体中的重夸克尼亚
DOI：
10.1142/s021773231330005x
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
A. Rothkopf
中科院分区：
文献类型：
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作者：
A. Rothkopf
重夸克元素的介质内物理是我们将物理基本定律知识与现象学预测联系起来的能力的理想试验场。一种可能的途径是尝试通过具有瞬时势的薛定谔方程来描述有限温度下的重夸克束缚态。在这里，我们回顾了设计一种综合方法的最新进展，该方法从第一原理 QCD 定义这种势，并从非微扰晶格 QCD 模拟中提取其通常复杂的值。基于开放量子系统理论，我们将通过引入随机势的概念来展示如何解释虚部在空间退相干方面的作用。讨论了缺点以及可能的改进途径。
The in-medium physics of heavy quarkonium is an ideal proving ground for our ability to connect knowledge about the fundamental laws of physics to phenomenological predictions. One possible route to take is to attempt a description of heavy quark bound states at finite temperature through a Schroedinger equation with an instantaneous potential. Here we review recent progress in devising a comprehensive approach to define such a potential from first principles QCD and extract its, in general complex, values from non-perturbative lattice QCD simulations. Based on the theory of open quantum systems we will show how to interpret the role of the imaginary part in terms of spatial decoherence by introducing the concept of a stochastic potential. Shortcomings as well as possible paths for improvement are discussed.