"Nondemolition measurements and their perturbations"Matt Fraas , LudwigMaximiliansUniversitÃ¤t Munich [Host: Israel Klich ]
ABSTRACT:
Indirect measurements, of which nondemolition measurements is a specific subclass, describe a physical situation in which an information about a quantum system is acquired through a direct measurement on a sequence of probes subsequently interacting with the system. Recent interest in the field originates in the photon counting experiments of Haroche. Mathematically the problem is equivalent to the study of statistics of long products of completely positive maps. I describe this mathematical theory with a special focus on the nondemolition subclass  this is the case when all the map commutes  and its small perturbation.

Atomic Physics Seminar Tuesday, March 29, 2016 3:30 PM Physics Building, Room 313 Note special date. Note special room. Special Quantum Information/Mathematical Physics Seminar 
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