Entanglement Cost of Antisymmetric States and Additivity of Capacity of Some Quantum Channel

Details Entanglement Cost of Antisymmetric States and Additivity of Capacity of Some Quantum Channel Entanglement Cost of Antisymmetric States and Additivity of Capacity of Some Quantum Channel

2003-06-02

arxiv.org/abs/quant-ph/0306009v2

2004 J. Phys. A: Math. Gen. 37 L167-L171

Physics

Quantum Physics

revtex 4 pages, no figures, small changes in title and author's affiliation and some typo are corrected

Scientific paper

10.1088/0305-4470/37/15/L03

We study the entanglement cost of the states in the contragredient space,
which consists of $(d-1)$ $d$-dimensional systems. The cost is always $\log_2
(d-1)$ ebits when the state is divided into bipartite $\C^d \otimes
(\C^d)^{d-2}$. Combined with the arguments in \cite{Matsumoto02}, additivity of
channel capacity of some quantum channels is also shown.

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