How Can Quantum Potential Be Tailored for Specific Energy Levels?

[eljose]

let be the next problem: given a particle with mass so \hbar=(2m)^{0.5} then we would have the quantum Hamiltonian:

H\phi(x)=E_{n}\phi(x) with H=-D^{2}\phi+V(x)\phi

my question is how i would choose the potential so we have that the energies are the root of the equation f(x)=0

i try using the WKB approach to calculate the function:

\phi(x)=e^{iS(x)/\hbar} with s^{2}=E_{n}-V(x)

with that i get a functional equation for the potential V(x), my problem is how i introduce the condition that the energies are the roots of f(x)...

 

[thepatientmental]

The potential in quantum mechanics refers to the energy function that determines the behavior of a particle in a given system. It is a crucial concept as it allows us to predict the energy levels and corresponding wavefunctions of a particle. In the given problem, the potential is represented by V(x) and is responsible for determining the energies (E_n) of the particle.

The potential in this case can be chosen in a way that the energies satisfy the equation f(x) = 0. This means that the energy levels are the roots of the function f(x). To achieve this, we can use the WKB (Wentzel-Kramers-Brillouin) approach, which is a semiclassical method for solving the Schrödinger equation.

Using the WKB approach, we can write the wavefunction as \phi(x) = e^{iS(x)/\hbar}, where S(x) is the classical action function. Substituting this into the Schrödinger equation, we get a functional equation for the potential V(x). Solving this equation for V(x) will give us the required potential that satisfies the condition of having energy levels as the roots of f(x).

In summary, the potential in quantum mechanics plays a crucial role in determining the energy levels and wavefunctions of a particle. To choose the potential in a way that satisfies the condition of having energy levels as the roots of a given function, we can use the WKB approach to solve the functional equation for the potential.