%0 Journal Article
%A Di Matteo, Olivia
%A Sánchez Soto, Luis Lorenzo
%A Leuchs, Gerd
%A Grassl, M.
%T Coarse graining the phase space of N qubits
%D 2017
%@ 2469-9926
%U https://hdl.handle.net/20.500.14352/17800
%X We develop a systematic coarse-graining procedure for systems of N qubits. We exploit the underlying geometrical structures of the associated discrete phase space to produce a coarse-grained version with reduced effective size. Our coarse-grained spaces inherit key properties of the original ones. In particular, our procedure naturally yields a subset of the original measurement operators, which can be used to construct a coarse discrete Wigner function. These operators also constitute a systematic choice of incomplete measurements for the tomographer wishing to probe an intractably large system.
%~