Sequential weak measurement

Details Sequential weak measurement Sequential weak measurement

2007-06-11

arxiv.org/abs/0706.1508v2

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevA.76.062105

The notion of weak measurement provides a formalism for extracting information from a quantum system in the limit of vanishing disturbance to its state. Here we extend this formalism to the measurement of sequences of observables. When these observables do not commute, we may obtain information about joint properties of a quantum system that would be forbidden in the usual strong measurement scenario. As an application, we provide a physically compelling characterisation of the notion of counterfactual quantum computation.

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