Bound entangled states violate a nonsymmetric local uncertainty relation

As a consequence of having a positive partial transpose, bound entangled states lack many of the properties otherwise associated with entanglement. It is therefore interesting to identify properties that distinguish bound entangled states from separable states. In this paper, it is shown that some bound entangled states violate a nonsymmetric class of local uncertainty relations @H. F. Hofmann and S. Takeuchi, Phys. Rev. A 68, 032103 ~2003!#. This result indicates that the asymmetry of nonclassical correlations may be a characteristic feature of bound entanglement.