Entanglement and complexity of thermal states

par Samuel GARRATT (Princeton University)

jeudi 11 déc. 2025, 14:00 → 15:30 Europe/Paris

Salle des fourmis (LAPTh)

Studies of entanglement in the ground states of many-body systems have provided insights into the relation between spatial correlations, low-energy spectral properties, and the computational resources required to describe a system. We know much less about entanglement in thermal equilibrium. This is because, at finite temperature, spatial correlations can be classical. In this talk I will show how entanglement in equilibrium is related to linear response. This relation allows for conventional experiments to detect how entanglement emerges on different length scales. I will then show how techniques from quantum statistical mechanics and field theory can be used to lower bound the resources necessary to prepare equilibrium states.

arXiv:2502.13218, arXiv:2510.02275