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arXiv · 1210.3469

The von Neumann entropy and unitary equivalence of quantum states

Roman Drnovšek
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Abstract

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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Roman Drnovšek. 2012-10-12. The von Neumann entropy and unitary equivalence of quantum states. https://arxiv.org/abs/1210.3469

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