%0 Journal Article %T Non-regular unary language and parallel communicating Watson-Crick automata systems %A Kingshuk Chatterjee %A Kumar Sankar Ray %J Computer Science %D 2015 %I arXiv %X In 2006, Czeizler et.al. introduced parallel communicating Watson-Crick automata system. They showed that parallel communicating Watson-Crick automata system can accept the non-regular unary language L={a^(n^2 ),where n>1} using non-injective complementarity relation and three components. In this paper, we improve on Czeizler et.al. work by showing that parallel communicating Watson-Crick automata system can accept the same language L using just two components. %U http://arxiv.org/abs/1510.02070v1