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

Matt Fraas
[Host: Israel Klich ]
LudwigMaximiliansUniversität Munich
"Nondemolition measurements and their perturbations"

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.




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