Dear group, Ivan is going to give a introductory talk on quantum walks. Please let me know if you will attend. I need to find a time who fits everybody interested and most likely it won't be on a group meeting slot. So, please reply by this Friday the latest if interested. Read below the description directly from Ivan: "Mike Stopa said two weeks ago that would be interested in hearing a talk about quantum walks on graphs. If you'd like, I could give one, in a format similar to that of my last group meeting. It would cover such things as what a quantum walk is, but probably mostly focus on that important paper by Childs and the MIT crowd showing an exponential speedup when two binary trees are joined by a random cycle at the leaves." Cheers, -A -- Alejandro Perdomo Ph.D. Candidate in Chemical Physics. Harvard University 12 Oxford St #482, Cambridge, MA, 02138. perdomo(a)fas.harvard.edu