TY - JOUR
T1 - Existence of Universal Entangler
JF - Journal of Mathematical Physics
Y1 - 2008
A1 - Jianxin Chen
A1 - Runyao Duan
A1 - Zhengfeng Ji
A1 - Mingsheng Ying
A1 - Jun Yu
AB - 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.
VL - 49
U4 - 012103
UR - http://arxiv.org/abs/0704.1473v2
CP - 1
J1 - J. Math. Phys.
U5 - 10.1063/1.2829895
ER -