IQI Weekly Seminar

Series: Institute for Quantum Information (IQI) Weekly Seminar Series

Symmetry-protected quantum memories

Stephen Bartlett, University of Sydney,

Abstract: A self-correcting quantum memory is a local spin lattice model that can protect encoded quantum information for a very long time even when it is coupled to a thermal bath. In three dimensions, potential models with this property are very highly constrained by a range of no-go theorems. What if we add symmetry to the mix? Symmetry protected topological (SPT) phases provide a richer structure compared with the usual topological models used as candidate quantum memories, especially in low spatial dimension. In this talk, I'll discuss some preliminary work that suggests that symmetry protection provides a new direction for constructing self correcting quantum memories in three dimensions.

Joint work with Sam Roberts, Alex Kubica and Beni Yoshida.

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