The Simple Criteria of SLOCC Equivalence Classes
arXiv:quant-ph/0604160 · doi:10.1016/j.physleta.2006.07.004
Abstract
We put forward an alternative approach to the SLOCC classification of entanglement states of three-qubit and four-qubit systems. By directly solving matrix equations, we obtain the relations satisfied by the amplitudes of states. The relations are readily tested since in them only addition, subtraction and multiplication occur.
The original version was submitted to PRA in Feb. 2005, the paper No. is AA10020. 14 pages for the present version. No figures