## Pims Visiting Scholar Speaker Series: Chris Godwil

- Date: 11/23/2012
- Time: 12:00

Lecturer(s):
Chris Godwil,

*University of Waterloo*
Location:

University of Lethbridge

Topic:

Continuous Quantum Walks on Graphs

Description:

If A is the adjacency matrix of a graph X, then the matrix exponentialU(t) = exp(itA) determines what physicists term a continuous quantum walk. They ask questions such as: for which graphs are the vertices a and b and a t such that jU(t)a;bj = 1? The basic problem is to relate the physical properties of the system with properties of the underlying graphs, and to study this we make use of results from the theory of graph spectra, number theory, ergodic theory. . . . My talk will present some of the progress on this topic.

Other Information:

Location: UHall B650