New angular momentum coherent states via the nonlinear Bose SU(2) generators and their nonclassical behaviors

Abstract

I theoretically construct a kind of new angular momentum coherent states by virtue of the nonlinear Bose SU(2) generators, and investigate their nonclassicality by analyzing the sub-Poissonian distributions, photon number distributions, entanglement entropy and Wigner phase-space distributions. The results show that the new states always have the sub-Poissonian distributions for all of the photon number sum $n_a+n_b=q$ of two modes, the photon number distributions are subjected to the parameter q, and the entanglement always increases quickly and then decreases slowly with increasing $\varsigma$, and the new states for odd q possess more stronger nonclassicality than for even q.