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2012-10-12
The von Neumann entropy and unitary equivalence of quantum states
Roman Drnovšek
文献摘要
K. He, J. Hou, and M. Li have recently given a sufficient and necessary condition for unitary equivalence of quantum states. This condition is based on the von Neumann entropy. In this note we first give a short proof of their result, and then we improve it.
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