Find the integral.
## Time Evolution in an Infinite Square Well

#### Description

The superposition shown---both Y_{n1n2}
and Y_{n1n2}^{*}Y_{n1n2}---is
an equal mix of the two states n_{1 }and n_{2 }for the infinite
square well, Y_{n1n2}(x,t)=(1/2)^{-1/2
}[f_{n1} (x,t) + f_{n2}
(x,t)]. The wave function evolves with time according to the TDSE.
You may change the state by choosing an n_{1} and n_{2}.
Time is shown in units of the revival time for the ground state wave function of
a particle in an infinite square well. In other words it is the time for
the wave function to undergo a phase change of 2p.

#### References

D.F. Styer, "Quantum Revivals Versus Classical Periodicity in the Infinite
Square Well," *Am. J. Phys.* **69**, 56-62 (2001).

#### Credits

Script by Mario Belloni.

Questions by Mario Belloni.

Java applets by Wolfgang Christian.