Classification of entanglement via rigged string configurations

@inproceedings{Kravets2013ClassificationOE,
  title={Classification of entanglement via rigged string configurations},
  author={Yevgen Kravets and Pawel Jakubczyk and Dorota Jakubczyk},
  year={2013}
}
We investigate the structure of bipartite entanglement in one-dimensional spin systems. The standard approach is based on a reduced two-qubit density matrix and uses concurrence as the measure of entanglement. We show that for a spin system consisting of four qubits the structure of bipartite entanglement can be classified by rigged string configurations in a strictly combinatorial manner.