Holographic fundamental matter in multilayered media

Ulf Gran, Niko Jokela, Daniele Musso, Alfonso V. Ramallo, Marcus Tornsö

Research output: Contribution to journalArticleScientificpeer-review


We describe a strongly coupled layered system in 3+1 dimensions by means of a top-down D-brane construction. Adjoint matter is encoded in a large-Nc stack of D3-branes, while fundamental matter is confined to (2 + 1)-dimensional defects introduced by a large-Nf stack of smeared D5-branes. To the anisotropic Lifshitz-like background geometry, we add a single flavor D7-brane treated in the probe limit. Such bulk setup corresponds to a partially quenched approximation for the dual field theory. The holographic model sheds light on the anisotropic physics induced by the layered structure, allowing one to disentangle flavor physics along and orthogonal to the layers as well as identifying distinct scaling laws for various dynamical quantities. We study the thermodynamics and the fluctuation spectrum with varying valence quark mass or baryon chemical potential. We also focus on the density wave propagation in both the hydrodynamic and collisionless regimes where analytic methods complement the numerics, while the latter provides the only resource to address the intermediate transition regime.
Original languageEnglish
Article number038
JournalJournal of High Energy Physics
Issue number12
Number of pages59
Publication statusPublished - 4 Dec 2019
MoE publication typeA1 Journal article-refereed

Fields of Science

  • 114 Physical sciences

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