Caltech Home > PMA Home > Calendar > IQI Weekly Seminar
open search form
Thursday, September 27, 2018
2:00 PM - 3:00 PM
Annenberg 107

IQI Weekly Seminar

Spurious topological entanglement entropy and subsystem symmetries in compactified cubic code
Dominic Williamson, Yale University,

Abstract: Compactifying one direction of the cubic code results in a family of two dimensional topological orders, equivalent to stacks of toric code enriched by translation symmetry. Surprisingly, some of these models have unbroken rigid 1D subsystem symmetries that lead to spurious contributions to the topological entanglement entropy. These spurious contributions can appear in a bulk computation of the topological entanglement entropy from a linear combination of subregion entropies with cancelling boundary terms. We introduce an entropic quantity that measures the presence of such spurious contributions.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

For more information, please contact Bonnie Leung by phone at 626.395.4964 or by email at [email protected].