Abstract
Quantum entanglement offers a microscopic language for describing quantum matter, but its full structure is often hidden beyond conventional correlation functions and entanglement entropy. In this seminar, I will present a protocol for resolving this structure through entanglement microscopy: a quantum Monte Carlo tomography framework that reconstructs reduced density matrices of local subregions and enables direct evaluation of bipartite and genuine multipartite entanglement. I will first introduce the method and show how it distinguishes sharply different entanglement patterns in two-dimensional Ising and Gross–Neveu–Yukawa quantum critical systems. I will then discuss its extension to multipartite entanglement in quantum Ising models across one, two, and three spatial dimensions, revealing how criticality enhances local genuine multipartite entanglement while dimensionality and entanglement monogamy suppress it. Finally, I will show how the same approach uncovers a distinct entanglement architecture at beyond-Landau quantum critical points, where fractionalization and emergent gauge fields redistribute entanglement from compact local clusters into larger, loopy structures. Together, these results establish entanglement microscopy as a powerful diagnostic of quantum criticality and a new route to mapping the organization of entanglement in strongly correlated many-body systems.
Anyone interested is welcome to attend.