Hi all,

this Wednesday, we have a seminar talk by Olivier Landon-Cardinal at 4pm in the Time Room.

Best wishes,
Markus



Title: Local topological order inhibits thermal stability in 2D

Speaker: Olivier Landon-Cardinal (University of Sherbrooke)

Abstract:
We study the robustness of quantum information stored in the degenerate ground space of a local, frustration-free Hamiltonian with commuting terms on a 2D spin lattice. On one hand, a macroscopic energy barrier separating the distinct ground states under local transformations would protect the information from thermal fluctuations. On the other hand, local topological order would shield the ground space from static perturbations. Here we demonstrate that local topological order implies a constant energy barrier, thus inhibiting thermal stability. Joint work with David Poulin.
arXiv:1209.5750

Date: Wednesday, December 5, 2012 - 4:00 pm
Location: Time Room