Chruściński, Dariusz; Pytel, Justyna; Sarbicki, Gniewomir
(2009-07-14)
We provide a new class of indecomposable entanglement witnesses. In 4 x 4 case it reproduces the well know Breuer-Hall witness. We prove that these new witnesses are optimal and atomic, i.e. they are able to detect the ...