- Series
- Math Physics Seminar
- Time
- Wednesday, April 27, 2011 - 4:30pm for 1 hour (actually 50 minutes)
- Location
- Skiles 006
- Speaker
- Günter Stolz – Dept. of Math. University of Alabama at Birmingham
- Organizer
- Michael Loss
We will show that a quantum xy-spin chain which is exposed to a randomexterior magnetic field satisfies a zero-velocity Lieb-Robinson bound. Thiscan be interpreted as dynamical localization for the spin chain or asabsence of information transport. We will also discuss a general result,which says that zero velocity LR-bounds in a quantum spin system implyexponential decay of ground state correlations. This is joint work withRobert Sims and Eman Hamza and motivated by recent works of Burrell-Osborneas well as Hastings.