Abstract
The superposition relation extended to the statistical operators is shown to be invariant under tensor product and partial trace operations. Particular mathematical examples of superposition are characterized as well as the nature of the Schmidt decomposition of pure states superposition of other pure states.
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Zecca, A. Superposition, Entanglement, and Product of States. International Journal of Theoretical Physics 42, 1621–1628 (2003). https://doi.org/10.1023/A:1025784129755
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DOI: https://doi.org/10.1023/A:1025784129755