Starts 26 Feb 2008 12:30
Ends 26 Feb 2008 20:00
Central European Time
ICTP
Main Building Seminar Room
Strada Costiera, 11 I - 34151 Trieste (Italy)
I introduce a sufficient condition for multi-particle entanglement which is also necessary and sufficient for sub shot-noise sensitivity in the estimation of a collective rotation angle. The connection is provided by the Fisher information, which is a simple measure of statistical distance among quantum states. I show how to produce this "useful" entanglement with dilute Bose-Einstein condensates and discuss applications on Mach-Zehnder interferometry with phase sensitivity at the Heisenberg limit.
  • M. Poropat