Würzburg Seminar on Quantum Field Theory and Gravity

Entanglement is the fundamental feature of quantum systems. While bipartite entanglement can be computed precisely as physical measure via entanglement entropy, the multipartite entanglement structure requires much more difficulty. I will explain how to understand the multiparty entanglement, devise physical quantities that signals multiparty entanglement. I will focus on a particular result that from utilizing these signals, we deduce crucial novel discovery on the entanglement structure special in holography that the purely Greenberger-Horn-Zeilinger (GHZ)-like entanglement is forbidden in holography, thereby disproving a conjecture for the role of GHZ in holography.