[quantum-info] Quantum information seminar on Wednesday

[Markus Mueller]

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


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