According to the holographic principle—one of the most influential frameworks in contemporary physics—gravitational physics in a bulk spacetime is dual to the quantum physics of a system defined on its boundary. We employ a deep learning approach to reconstruct the bulk spacetime geometry from boundary quantum data, such as conductivity and entanglement entropy. This method offers novel...
We show that inflationary magnetogenesis can occur without modifying the microscopic Maxwell action. The observable photon sector inside a de Sitter causal patch is treated as a reduced subsystem that relaxes at a finite rate toward a horizon-selected quasi-static branch. Because the physical photon frequency continuously redshifts during inflation, this reduced dynamics cannot track the...
We construct black hole solutions in four-dimensional Einstein-Yang-Mills theory with U(2) gauge group. We take a near-extremal limit of the black hole solutions coupled with Yang-Mills instantons which reduces to Witten's multi-instanton solutions described by the Liouville theory in two-dimensional Abelian Higgs model.
We consider a semi-classical quantization of the near-extremal black...
We study particular gravity duals to the inhomogeneously mass-deformed ABJM (ImABJM) theory. The final goal of this paper is to obtain the ABJM theory deformed by a delta function-type mass. The resultant theory can be interpreted as the ABJM theory with defects. The mass operators of the mass-deformed ABJM (mABJM) theory are identified with these defect operators. Corresponding gravity duals...
