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Coarse graining the phase space of $N$ qubits by Di Matteo, Olivia; Sanchez-Soto, Luis L.; Leuchs, Gerd; Grassl, Markus is a scholarly article available to read on EtoBox.

What is Coarse graining the phase space of $N$ qubits about?

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.

Author

Di Matteo, Olivia; Sanchez-Soto, Luis L.; Leuchs, Gerd; Grassl, Markus

Published

2017

Language

EN