Here are the details of the next Q+ hangout.
Date/time: Mon. 27th May 2013 3pm BST (UTC+1)
Speaker: David Poulin (University of Sherbrooke)
Title: Tradeoffs Between Thermal and Quantum Fluctuations in 2D Quantum Memories
Abstract: Under a certain set of conditions collectively known as “local topological order”, the low energy spectrum of a system is robust to local perturbations. This has the consequence that quantum information encoded in the degenerate ground state of such a system is stable at zero temperature. On the other hand, the existence of a macroscopic energy barrier between ground states imply that information encoded in the low energy manifold is robust against thermal fluctuations. Here, we demonstrate that for local commuting projector codes, local topological order prohibits the existence of an energy barrier, which shows a tradeoff between robustness to quantum and thermal fluctuations.
To watch the talk live, go to http://gplus.to/qplus at the appointed hour. To keep up to date with the latest news about Q+ hangouts you can follow us on:
or visit our website.
Copyright © 2013 Matthew Leifer. All Rights Reserved.