1207.1596 (Ting Gao et al.)

Detection of $k$-nonseparable $n$-partite quantum states    [PDF]

Ting Gao, Yan Hong

The detection of multipartite entanglement in arbitrary dimensional systems is investigated. We derive useful $k$-separability criteria of mixed $n$-partite ($n\geq 3$) quantum states to detect $k$-nonseparable $n$-partite quantum states. Our criteria can be expressed by the elements of the density matrix, which allows a simple and practical evaluation and computation. They are experimentally accessible without quantum state tomography.

View original: http://arxiv.org/abs/1207.1596