تقرير
Holographic Wilson Lines as Screened Impurities
| العنوان: | Holographic Wilson Lines as Screened Impurities |
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| المؤلفون: | Evans, Nick, O'Bannon, Andy, Rodgers, Ronnie |
| المصدر: | JHEP 03 (2020) 188 |
| سنة النشر: | 2019 |
| المجموعة: | High Energy Physics - Theory |
| مصطلحات موضوعية: | High Energy Physics - Theory |
| الوصف: | In Landau Fermi liquids, screened impurities support quasi-bound states, representing electrons bound to the impurity but making virtual excursions away. Signals of these quasi-bound states are electron-impurity scattering phase shifts and the corresponding resonances in cross sections. We consider large-$N$, strongly-coupled $(3+1)$-dimensional $\mathcal{N}=4$ supersymmetric $SU(N)$ Yang-Mills theory on the Coulomb branch, where an adjoint scalar has a non-zero expectation value that breaks $SU(N) \to SU(N-1) \times U(1)$. In the holographic dual we re-visit well-known solutions for a probe D3-brane that describe this theory with a symmetric-representation Wilson line "impurity." We present evidence that the adjoint scalar screens the Wilson line, by showing that quasi-bound states form at the impurity, producing $U(1)$-impurity scattering phase shifts and corresponding resonances in cross sections. The quasi-bound states appear holographically as quasi-normal modes of probe D3-brane fields, even in the absence of a black hole horizon, via a mechanism that we argue is generic to screened defects in holography. We also argue that well-known generalisations of these probe D3-brane solutions can describe lattices of screened Wilson/'t Hooft line impurities. Comment: 29 pages, 11 figures. v2: Added reference, clarified discussion, version published in JHEP |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1007/JHEP03(2020)188 |
| URL الوصول: | http://arxiv.org/abs/1912.09417 |
| رقم الأكسشن: | edsarx.1912.09417 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1007/JHEP03(2020)188 |
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