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Title: Macroscopic features of quantum fluctuations in large-N qubit systems
Author: Klimov, Andrei B.
Munoz, C.
Issue Date: 2014
Abstract: We introduce a discrete Q function of an N-qubit system projected into the space of symmetric measurements as a tool for analyzing general properties of quantum systems in the macroscopic limit. For known states the projected Q function helps to visualize the results of collective measurements, and for unknown states it can be approximately reconstructed by measuring the lowest moments of the collective variables. © 2014 American Physical Society.
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