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According to the AdS/CFT correspondence, certain quantum many-body systems in$d$-dimensions are equivalent to gravitational theories in $(d+1)$-dimensionalasymptotically AdS spacetimes. When a massless particle is sent from the AdSboundary to the bulk curved spacetime, it reaches another point of the boundaryafter a time lag. In the dual quantum system, it should appear as ifquasiparticles have been transferred between two separated points. Wetheoretically demonstrate that this phenomenon, which we call"spacetime-localized response," is actually observed in the dynamics of theone-dimensional transverse-field Ising model near the quantum critical point.This result suggests that, if we can realize a holographic spin system in alaboratory, the experimental probing of the emergent extra-dimension ispossible by applying a designed stimulus to a quantum many-body system, whichis holographically equivalent to sending a massless particle through thehigher-dimensional curved bulk geometry. We also discuss possible experimentalrealizations using Rydberg atoms in an optical tweezers array.

Spacetime-Localized Response in Quantum Critical Spin Systems: Insights from Holography