2026-08-23T19:30:04Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/178002023-08-25T20:14:33Zcom_20.500.14352_14col_20.500.14352_15

Coarse graining the phase space of N qubits Di Matteo, Olivia Sánchez Soto, Luis Lorenzo Leuchs, Gerd Grassl, M. 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. 2023-06-17T21:55:42Z 2023-06-17T21:55:42Z 2023-06-17T21:55:42Z 2017-02-28 journal article https://hdl.handle.net/20.500.14352/17800 2469-9926 10.1103/PhysRevA.95.022340 eng FIS2015-67963-P open access Amer Physical Soc