Next Tues. seminar

[CM ICTP - Trieste]

JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR


Tuesday, 26 February    -    12:30 hrs.




Seminar Room-ICTP Main Building-1st floor



A. SMERZI   ( CNR BEC-INFM, Trento )


" Entanglement, nonlinear dynamics and Heisenberg limit with 
Bose-Einstein condensates "



Abstract

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.