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Journal Article

Tomography from collective measurements

MPS-Authors

Grassl,  M.
Quantumness, Tomography, Entanglement, and Codes, Emeritus Group Leuchs, Emeritus Groups, Max Planck Institute for the Science of Light, Max Planck Society;

Sanchez-Soto,  L. L.
Quantumness, Tomography, Entanglement, and Codes, Emeritus Group Leuchs, Emeritus Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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1809.04816.pdf
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Citation

Muñoz, A., Klimov, A. B., Grassl, M., & Sanchez-Soto, L. L. (2018). Tomography from collective measurements. Quantum Information Processing, 17: 286. doi:10.1007/s11128-018-2045-0.


Cite as: https://hdl.handle.net/21.11116/0000-0006-DF64-F
Abstract
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.