<正>This paper is concerned with the generalized nonlinear second-order equation.By the direct construction method,all of the first-order multipliers of the equ
<正>We propose a bidirectional quantum secure direct communication(QSDC) network protocol with the hyperentanglment in both the spatial-mode ad the polarization
<正>A scheme for one-step preparation of atomic GHZ states in two directly coupled cavities via virtual excitations is proposed.In the whole procedure,the infor