ITP OpenIR  > 2012年知识产出
Photoproduction and conductivity in dense holographic QCD
Bu, YY; Bu, YY (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
2012
发表期刊PHYSICAL REVIEW D
ISSN1550-7998
卷号86期号:2页码:26003
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.
部门归属[Bu, Yan Yan] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China; [Bu, Yan Yan] Max Planck Inst Phys & Astrophys, Werner Heisenberg Inst, D-80805 Munich, Germany
关键词Quark-gluon Plasma Ads/cft
学科领域Physics
资助者MPS-CAS ; MPS-CAS ; MPS-CAS ; MPS-CAS
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收录类别SCI
语种英语
资助者MPS-CAS ; MPS-CAS ; MPS-CAS ; MPS-CAS
WOS记录号WOS:000305894600002
引用统计
被引频次:10[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/15061
专题2012年知识产出
通讯作者Bu, YY (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
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GB/T 7714
Bu, YY,Bu, YY . Photoproduction and conductivity in dense holographic QCD[J]. PHYSICAL REVIEW D,2012,86(2):26003.
APA Bu, YY,&Bu, YY .(2012).Photoproduction and conductivity in dense holographic QCD.PHYSICAL REVIEW D,86(2),26003.
MLA Bu, YY,et al."Photoproduction and conductivity in dense holographic QCD".PHYSICAL REVIEW D 86.2(2012):26003.
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