With the coefficients found, the global solution can be found. Therefore, the transmission coefficient for a particle tunneling through a single potential barrier is T ( E ) = e − − 2 ∫ ∫ x 1 x 2 d x 2 m ℏ ℏ 2 [ V ( x ) − − E ] , where x 1 , x 2 are the two classical turning points for the potential barrier.