A method of estimating the eigenstates of density operator
We describe a mathematical structure which corresponds to the eigenstates of a density operator. For an unknown density operator, we propose an estimating procedure which uses successive “yes/no” measurements to scan the Bloch sphere and approximately yields the eigenstates. This result is based on the quantum method of types and implies a relationship between the typical subspace and the Young frame.
Keywordsquantum state estimation eigenstate density operator
CLC numberTP 305
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