Coarse graining the phase space of N qubits

Di Matteo O, Sanchez-Soto LL, Leuchs G, Grassl M (2017)

Publication Type: Journal article

Publication year: 2017

Journal

Physical Review A American Physical Society

Book Volume: 95

Article Number: 022340

Journal Issue: 2

DOI: 10.1103/PhysRevA.95.022340

Abstract

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.

Authors with CRIS profile

Gerhard Leuchs

Involved external institutions

Max-Planck-Institut für die Physik des Lichts (MPL) / Max Planck Institute for the Science of Light DE Germany (DE) University of Waterloo (UW) CA Canada (CA) Universidad Complutense de Madrid (UCM) ES Spain (ES)

How to cite

APA:

Di Matteo, O., Sanchez-Soto, L.L., Leuchs, G., & Grassl, M. (2017). Coarse graining the phase space of N qubits. Physical Review A, 95(2). https://doi.org/10.1103/PhysRevA.95.022340

MLA:

Di Matteo, Olivia, et al. "Coarse graining the phase space of N qubits." Physical Review A 95.2 (2017).

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