128
K. Ishida
Fig. 6.4 Lattice
displacement u(t) for a
α 2 = α 3 = 0, λ = 1.5, b
α 2 = α 3 = 3.16, λ = 1.5,
and a
α 2 = α 3 = 3.16, λ = 0.
Calculated results with the
semiclassical approximation
are shown by the dotted line,
and the blue line in (a) shows
u(t) for n = 1
t[1/ω]
u(t)
(a)
n=3, α 2 =α 3 =0, λ=1.5
n=1
semiclassical
0
1 0
2 0
-4
-2
0
t[1/ω]
u(t)
α 2 =α 3 =3.16, λ=1.5
semiclassical
(b)
0
1 0
2 0
-5
-4
-3
-2
-1
0
t[1/ω]
(c)
u(t)
α 2 =α 3 =0, λ=0
semiclassical
0
1 0
2 0
-6
-4
-2
0
2