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The Airy Wave Train

B
0.1
m
1.
x
-150.
t
0.
range
-35.
points
90
view
x
t
x - t
Berry and Balazs [1] found a particular wavepacket in terms of an Airy function with the following properties:
1. It does not spread as it evolves in time.
2. It preserves its shape.
3. It accelerates, despite the fact that there are no apparent forces acting.
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