@article {1453,
title = {Existence of Universal Entangler},
journal = {Journal of Mathematical Physics},
volume = {49},
year = {2008},
month = {2008/01/01},
pages = {012103},
abstract = { A gate is called entangler if it transforms some (pure) product states to
entangled states. A universal entangler is a gate which transforms all product
states to entangled states. In practice, a universal entangler is a very
powerful device for generating entanglements, and thus provides important
physical resources for accomplishing many tasks in quantum computing and
quantum information. This Letter demonstrates that a universal entangler always
exists except for a degenerated case. Nevertheless, the problem how to find a
universal entangler remains open.
},
doi = {10.1063/1.2829895},
url = {http://arxiv.org/abs/0704.1473v2},
author = {Jianxin Chen and Runyao Duan and Zhengfeng Ji and Mingsheng Ying and Jun Yu}
}