Physics – Quantum Physics
Scientific paper
2007-04-17
Published in PRA 76, 032304 (2007) with minimal changes
Physics
Quantum Physics
22 pages, no figure, lemma 4 and corollary 3 and the conjecture for odd n-qubits in the previous version were deleted because
Scientific paper
In this paper, we find the invariant for $n$-qubits and propose the residual
entanglement for $n$-qubits by means of the invariant. Thus, we establish a
relation between SLOCC entanglement and the residual entanglement. The
invariant and the residual entanglement can be used for SLOCC entanglement
classification for $n$-qubits.
Huang Haifeng
Li Daming
Li Xiaoliang
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