Department of Physics, Anhui University, Hefei 230039,P. R. China;
Department of Physics, Anhui University, Hefei 230039,P. R. China;
Department of Physics, Anhui University, Hefei 230039,P. R. China;
Department of Physics, Anhui University, Hefei 230039,P. R. China;
Entangled state; Rotation operation; Squeeze; Density operator;