Let Lα = − 12 ∑n j=1 ( ZjZj + ZjZj ) + iαT be the sub-Laplacian on the nonisotropic Heisenberg group Hn where Zj , Z̄j for j = 1, 2, · · · , n and T are a basis of the Lie algebra hn. We apply the Laguerre calculus to obtain the fundamental solution of the heat kernel exp{−sLα}, the Schrödinger operator exp{−isLα} and the operator ∆λ,α = − 12 ∑n j=1 λj(ZjZ̄j + Z̄jZj) + iαT. We also discuss some ba...