Tomography from collective measurements
arXiv:1809.04816 · doi:10.1007/s11128-018-2045-0
Abstract
We discuss the tomography of -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.
arXiv commentAccepted for publication in Quantum Information Processing
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