Given the
Gaussian distribution
\[
\begin{gather}
\rho(x)=A\operatorname{e}^{-\lambda(x-a)^{2}}
\end{gather}
\]
where
A,
a and
λ are constants.
a) Determine the constant
A;
b) Determine
\( \langle x\rangle \),
\( \langle x^{2}\rangle \)
e σ;
c) Sketch the graph of
ρ(
x).
At
t = 0, a particle is represented by the following wave function
\[
\begin{gather}
\Psi (x,0)=
\left\{\begin{array}{l}
\;\dfrac{Ax}{a}\,,&\text{if}\;0\leqslant x\leqslant a\\
\;\dfrac{A(b-x)}{(b-a)}\,,&\text{if}\;a\leqslant x\leqslant b\\
\;\;0\,,&\text{otherwise}
\end{array}
\right.
\end{gather}
\]
where
A,
a, and
b are constants
a) Normalize Ψ (that is, determine A in terms of a and b);
b) Sketch the graph of Ψ(x, 0) as a function of
x;
c) What is the most likely position of the particle at
t = 0?
d) What is the probability of finding the particle to the left of
a? Check your result in the limit
cases,
b =
a and
b = 2
a;
e) What is the expectation value of
x?