A note on state decomposition independent local invariants Ting-Gui Zhang, Naihuan Jing, Xianqing Li-Jost, Ming-Jing Zhao and Shao-Ming Fei Eur. Phys. J. D, 67 8 (2013) 175 Published online: 06 August 2013 DOI: 10.1140/epjd/e2013-40068-7