potential_2D esta.transitionState.potential_2D ¶ calculate the potential energy on 2D surface using the following potential energy function: v(x,y) = Ax cos(2pix) + Ay sin(2piy) x → 0 to 4 y → -2 to 2 get_potential_energy() ¶ v(x,y) = Ax cos(2pix) + Ay sin(2piy)