The 43rd International Symposium on Lattice Field Theory (Lattice 2026)

Probing Criticality in the (1+1)D Real Scalar $\phi^4$ Theory with Entanglement Entropy and HOTRG

30 Jul 2026, 14:20

20m

Margaret Brent B (Adele H. Stamp Student Union)

Contributed talk Theoretical developments and applications beyond the Standard Model Theoretical developments and applications beyond the SM

Speaker

Takahiro Hayazaki (Kanazawa University)

Description

Entanglement entropy (EE) is a measure of quantum entanglement and provides a powerful probe of critical behavior. In particular, an effective central charge can be extracted from the EE and is expected to provide valuable information about criticality. We compute the EE in the (1+1)-dimensional real scalar $\phi^4$ theory using the higher-order tensor renormalization group (HOTRG) method. We then investigate whether the effective central charge can be used to identify the critical point of the theory.