Multiplicativity of the maximal output 2-norm for depolarized Werner-Holevo channels

Details Multiplicativity of the maximal output 2-norm for depolarized Werner-Holevo channels Multiplicativity of the maximal output 2-norm for depolarized Werner-Holevo channels

2007-07-11

arxiv.org/abs/0707.1722v1

J. Math. Phys., 48, Issue 12 (2007).

Physics

Quantum Physics

3 pages

Scientific paper

10.1063/1.2818737

We study the multiplicativity of the output 2-norm for depolarized Werner-Holevo channels and show that multiplicativity holds for a product of two identical channels in this class. Moreover, it shown that the depolarized Werner-Holevo channels do not satisfy the entrywise positivity condition introduced by C. King and M.B. Ruskai, which suggests that the main result is non-trivial.

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