Validation and improvement of the ZPC parton cascade inside a box
文献类型：期刊论文
| 作者 | Zhao, XL; Ma, GL; Ma, YG; Lin, ZW |
| 刊名 | PHYSICAL REVIEW C
 |
| 出版日期 | 2020 |
| 卷号 | 102期号:2页码:- |
| 关键词 | IRREVERSIBLE-PROCESSES GLUON PLASMA COLLISIONS ANISOTROPY CAUSALITY EQUATION ESCAPE FLOW |
| ISSN号 | 0556-2813 |
| DOI | 10.1103/PhysRevC.102.024904 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Cascade solutions of the Boltzmann equation suffer from causality violation at high densities and/or scattering cross sections. Although the particle subdivision technique can reduce the causality violation, it alters event-by-event correlations and fluctuations and is also computationally expensive. Here we evaluate and then improve the accuracy of the ZPC parton cascade for elastic scatterings inside a box without using parton subdivision. We first test different collision schemes for the collision times and ordering time and find that the default collision scheme does not accurately describe the equilibrium momentum distribution at large opacities. We then find a specific collision scheme that can describe very accurately the equilibrium momentum distribution as well as the time evolution towards equilibrium, even at large opacities. We also calculate the shear viscosity and the eta/s ratio of the parton systems and confirm that the new collision scheme is more accurate. In addition, we use a novel parton subdivision method to obtain the "exact" evolution of the system. This subdivision method is valid for such box calculations and is so much more efficient than the standard subdivision method that we use a subdivision factor of 10(6) in this study. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/33263]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China 2.Fudan Univ, Inst Modern Phys, Key Lab Nucl Phys & Ion Beam Applicat MOE, Shanghai 200433, Peoples R China 3.East Carolina Univ, Dept Phys, Greenville, NC 27858 USA 4.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, XL,Ma, GL,Ma, YG,et al. Validation and improvement of the ZPC parton cascade inside a box[J]. PHYSICAL REVIEW C,2020,102(2):-. |
| APA | Zhao, XL,Ma, GL,Ma, YG,&Lin, ZW.(2020).Validation and improvement of the ZPC parton cascade inside a box.PHYSICAL REVIEW C,102(2),-. |
| MLA | Zhao, XL,et al."Validation and improvement of the ZPC parton cascade inside a box".PHYSICAL REVIEW C 102.2(2020):-. |
入库方式： OAI收割
来源：上海应用物理研究所
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