Spectral conditions for entanglement witnesses vs. bound entanglement

Dariusz Chruscinski, Andrzej Kossakowski, Gniewomir Sarbicki

Published 2009-08-13, updated 2009-08-19Version 2

It is shown that entanglement witnesses constructed via the family of spectral conditions are decomposable, i.e. cannot be used to detect bound entanglement. It supports several observations that bound entanglement reveals highly non-spectral features.