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SYEC: Symposium Entanglement and Complexity – How “Complex” is Nature?

SYEC 1: Entanglement and Complexity – How “Complex” is Nature?

Thursday, September 11, 2025, 10:45–12:45, ZHG010

Entanglement, a key resource in quantum phenomena, was already recognised in the early days of quantum mechanics. In recent decades, the development of quantum information and computing has revealed that carefully engineering quantum dynamics can lead to computational advantages for various classical and quantum problems, as well as secure communication methods. Complexity theory aims to describe and classify different classes of problems based on their “complexity”, the resources required to implement the desired task. Surprisingly, these two descriptions reveal a deep connection between how complex and non-classical quantum systems can be. The symposium on entanglement and complexity explores these connections across a wide range of topics. Speakers include M. Heller, who discusses entanglement in quantum field theories; E. Gräfe, exploring entanglement and quantum chaos; N. Callebaut, who delves into entanglement in the AdS/CFT correspondence; and A. Anshu, examining computational complexity and its connection to entanglement. This symposium showcases how these two fields can benefit from mutual exchange.

	10:45	SYEC 1.1	Invited Talk: Quantum Information and Spacetime: New Ideas and Results — •Michal P. Heller
	11:15	SYEC 1.2	Invited Talk: Entanglement in holography — •Nele Callebaut
	11:45	SYEC 1.3	Invited Talk: The theory of learnability of local Hamiltonians from Gibbs states — •Anurag Anshu
	12:15	SYEC 1.4	Invited Talk: There's a hole in my quantum bucket -- complexified quantum theory and its classical limit — •Eva-Maria Graefe