3/2-body correlations in the ground state of Bose–Einstein condensates

Recently, one of the author has been constructed a variational wave function, which describes weakly interacting Bose--Einstein condensates (BECs) with dynamical 3/2-body correlations, where one of the two colliding non-condensates drops into the condensate and visa versa. In this presentation, we apply the variational method to (1) M-component BEC and (2) BEC trapped by a general trap to investigate the properties of 3/2-body correlations in BECs more qualitatively. From our numerical results in both cases, the 3/2-body correlations lower the ground-state energy in an amount comparable to the mean-field contribution.