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Bu, YY; Bu, YY (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
Photoproduction and conductivity in dense holographic QCD
Source PublicationPHYSICAL REVIEW D
Language英语
KeywordQuark-gluon Plasma Ads/cft
AbstractWe 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.
2012
ISSN1550-7998
Volume86Issue:2Pages:26003
Subject AreaPhysics
Indexed BySCI
Funding OrganizationMPS-CAS ; MPS-CAS ; MPS-CAS ; MPS-CAS
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/15061
CollectionSCI期刊论文
Corresponding AuthorBu, YY (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
Recommended Citation
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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