RT Journal Article T1 Tomography from collective measurements A1 Muñoz, A. A1 Klimov, Andrei B. A1 Grassl, M. A1 Sánchez Soto, Luis Lorenzo AB We discuss the tomography of N-qubit states using collective measurements. The method is exact for symmetric states, whereas for not completely symmetric states the information accessible can be arranged as a mixture of irreducible SU(2) blocks. For the fully symmetric sector, the reconstruction protocol can be reduced to projections onto a canonically chosen set of pure states. PB Springer SN 1570-0755 YR 2018 FD 2018-10 LK https://hdl.handle.net/20.500.14352/12292 UL https://hdl.handle.net/20.500.14352/12292 LA eng NO © 2018 Springer Nature Switzerland AG.Open access funding provided by Max Planck Society. This work is partially supported by the Grant 254127 of CONACyT (Mexico). L. L. S. S. acknowledges the support of the Spanish MINECO (Grant FIS2015-67963-P). NO Ministerio de Economía y Competitividad (MINECO) NO Max Planck Society DS Docta Complutense RD 9 may 2024