arXiv:1107.1023 [quant-ph]AbstractReferencesReviewsResources
Existence of product vectors and their partial conjugates in a pair of spaces
Young-Hoon Kiem, Seung-Hyeok Kye, Jungseob Lee
Published 2011-07-06, updated 2011-11-22Version 3
Let $D$ and $E$ be subspaces of the tensor product of the $m$ and $n$ dimensional complex spaces, with codimensions $k$ and \ell$, respectively. We show that if $k+\ell<m+n-2$ then there must exist a product vector in $D$ whose partial conjugate lies in $E$. If $k+\ell >m+n-2$ then there may not exist such a product vector. If $k+\ell=m+n-2$ then both cases may occur depending on $k$ and $\ell$.
Comments: 15 pages, to correct a technical problem in V2
Journal: J. Math. Phys. 52, 122201 (2011)
DOI: 10.1063/1.3663835
Tags: journal article
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