a
1
1
p
1
0
a
2
0
p
2
0
a
3
0
p
3
0
t
0
Ψ
(
x
,
t
=
0
)
=
∑
ψ
n
c
n
(
x
)
Ψ
(
x
,
t
)
=
∑
c
n
ψ
n
(
x
)
i
E
n
t
/
h
e
c
1
=
1
c
2
=
0
c
3
=
0
<
H
>
=
1