Caltech Logo

IQIM Postdoctoral and Graduate Student Seminar

Friday, December 6, 2019
12:00pm to 1:00pm
Add to Cal
East Bridge 114
Fusion rules from entanglement
Kohtaro Kato, Postdoctoral Scholar in Theoretical Physics,

Abstract: Connections between 2D gapped quantum phases and the anyon fusion theory have been proven in various ways under different settings. In this work, we introduce a new framework connecting them by only assuming a conjectured form of entanglement area law for 2D gapped systems. We show that one can systematically define topological charges and fusion rules from the area law alone, in a well-defined way. We then derive the fusion rules of charges satisfy all the axioms required in the algebraic theory of anyons. Moreover, even though we make no assumption about the exact value of the constant sub-leading term of the entanglement entropy, this term is shown to be equal to the logarithm of the total quantum dimension of the anyon theory we defined.

https://arxiv.org/abs/1906.09376

For more information, please contact Marcia Brown by phone at 626-395-4013 or by email at marciab@caltech.edu.