Photoproduction and conductivity in dense holographic QCD
文献类型：期刊论文
| 作者 | Bu, YY |
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2012 |
| 卷号 | 86期号:2页码:26003 |
| 关键词 | QUARK-GLUON PLASMA ADS/CFT |
| ISSN号 | 1550-7998 |
| 通讯作者 | Bu, YY (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China. |
| 英文摘要 | We explore the photoemission rate and conductivity in dense QCD by taking the AdS/CFT methods. Specifically, we take three QCD gravity dual models to do comparative studies: D4/D6 model, noncritical Sakai-Sugimoto model and soft-wall AdS/QCD model. We turn on the time component of flavor U(1) gauge field in the bulk side to model the baryon density in QCD. For all three models, we numerically solve the U(1) fluctuation equation to plot the spectral function and photoemission rate for lightlike momenta as well as the AC conductivity. We find that the results for the former two models are very similar to previous studies while the last one show some differences. The conductivity in the soft-wall model seems to be similar to that of holographic superconductor constructed from five-dimensional bulk gravity, i.e. the pseudogap structure. This should be owing to that the infrared (IR) soft-wall (an effective cutoff near the IR of the geometry) produces a mass gap in the dual field theory, which has imprinting in the conductivity as a pseudogap formation. However, the DC conductivity in our computations is finite while it should be a delta peak in holographic superconductor models. Our results show the importance of dilaton running in affecting physical quantities. |
| 学科主题 | Physics |
| 收录类别 | SCI |
| 资助信息 | MPS-CAS |
| 原文出处 | http://dx.doi.org/10.1103/PhysRevD.86.026003 |
| 语种 | 英语 |
| WOS记录号 | WOS:000305894600002 |
| 公开日期 | 2014-04-25 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/15061]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 推荐引用方式 GB/T 7714 | Bu, YY. Photoproduction and conductivity in dense holographic QCD[J]. PHYSICAL REVIEW D,2012,86(2):26003. |
| APA | Bu, YY.(2012).Photoproduction and conductivity in dense holographic QCD.PHYSICAL REVIEW D,86(2),26003. |
| MLA | Bu, YY."Photoproduction and conductivity in dense holographic QCD".PHYSICAL REVIEW D 86.2(2012):26003. |
入库方式： OAI收割
来源：理论物理研究所
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