Necessary and sufficient conditions for local creation of quantum correlation
Quantum Physics
2012-03-08 v2
Abstract
Quantum correlation can be created by a local operation from some initially classical states. We prove that the necessary and sufficient condition for a local trace-preserving channel to create quantum correlation is that it is not a commutativity-preserving channel. This condition is valid for arbitrary finite dimension systems. We also derive the explicit form of commutativity-preserving channels. For a qubit, a commutativity-preserving channel is either a completely decohering channel or a mixing channel. For a three-dimensional system (qutrit), a commutativity-preserving channel is either a completely decohering channel or an isotropic channel.
Keywords
Cite
@article{arxiv.1112.3141,
title = {Necessary and sufficient conditions for local creation of quantum correlation},
author = {Xueyuan Hu and Heng Fan and D. L. Zhou and Wu-Ming Liu},
journal= {arXiv preprint arXiv:1112.3141},
year = {2012}
}
Comments
Theorem 2 has been modified