Existence of Universal Entangler
Quantum Physics
2009-11-13 v2
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.
Keywords
Cite
@article{arxiv.0704.1473,
title = {Existence of Universal Entangler},
author = {Jianxin Chen and Runyao Duan and Zhengfeng Ji and Mingsheng Ying and Jun Yu},
journal= {arXiv preprint arXiv:0704.1473},
year = {2009}
}
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4 pages