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Abstract: In Phys. Rev. A 62, 062314 2000, D\-{u}r, Vidal and Cirac indicated thatthere are infinitely many SLOCC classes for four qubits. Verstraete, Dehaene,and Verschelde in Phys. Rev. A 65, 052112 2002 proposed nine families ofstates corresponding to nine different ways of entangling four qubits. In Phys.Rev. A 75, 022318 2007, Lamata et al. reported that there are eight trueSLOCC entanglement classes of four qubits up to permutations of the qubits. Inthis paper, we investigate SLOCC classification of the nine families proposedby Verstraete, Dehaene and Verschelde, and distinguish 49 true SLOCCentanglement classes from them.



Autor: D. Li, X. Li, H. Huang, X. Li

Fuente: https://arxiv.org/







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