Solution to the Schrödinger equation for a non rigid step

In summary, the conversation discusses troubles with resolving the Schödinger's time independent one-dimensional equation for a particle moving between two zones with different constant potentials, where the potential is a continuous function. The main problem is with finding a solution in the non-constant region of the potential, which can be represented by the differential equation Eψ(x)=(ℏ²/2m)(d²ψ(x)/dx²)+(V₀/d)xψ(x). The person has tried solving the equation by lowering its order, but has not been successful. They are asking for alternative ways to approach the problem or for help in resolving the differential equation. It is mentioned that the solutions to the problem involve using Airy functions.
  • #1
Arturo Miranda
2
0
I've been having troubles resolving the Schödinger's time independent one-dimensional equation when you have a particle that goes from a zone with a constant potential to a zone with another constant potential, yet the potential is a continuos function of the form:

$$
V(x)=\left\{
\begin{array}{lcl}
0&\text{if}&x<0\\
\displaystyle\frac{V_{0}}{d}x&\text{if}&0<x<d\\
V_{0}&\text{if}&d<x
\end{array}\right.
$$

My main problem is around the solution in the second region of the potential, the non-constant region, in which looks like:
$$E\psi(x)=\frac{\hbar^{2}}{2m}d_{x}^{2}\psi(x)+\frac{V_{0}}{d}x\,\psi(x)$$
If tried solving the differential equation by lowering it's order, yet I have not managed to do so. Is there another way of attacking the problem? Or how may I resolve the diff. equation?
 
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  • #4
No worries - it's not something you were going to guess.
Note: this sort of thing happens a lot.
 
  • #5


I would recommend using numerical methods to solve this differential equation. Given the complexity of the potential function, it may not be possible to find an analytical solution. However, numerical methods such as the finite difference method or the shooting method can provide accurate solutions to this type of problem.

In addition, it may be helpful to break the problem into smaller parts and solve them separately. For example, you could solve for the wave function in the first and third regions of the potential (where it is constant) and then use these solutions as boundary conditions for the second region. This can simplify the problem and make it more manageable.

Another approach could be to use perturbation theory, where the non-constant region is treated as a small perturbation to the overall potential. This can provide an approximate solution that can be refined through iteration.

Overall, the key is to approach the problem systematically and use a combination of analytical, numerical, and approximation techniques to arrive at a solution.
 

Related to Solution to the Schrödinger equation for a non rigid step

1. What is the Schrödinger equation for a non rigid step?

The Schrödinger equation for a non rigid step is a mathematical expression that describes how the wave function of a quantum system evolves over time when encountering a potential step that is not rigid. It is an extension of the original Schrödinger equation, which only applies to rigid potential steps.

2. Why is the solution to the Schrödinger equation for a non rigid step important?

The solution to this equation allows us to understand the behavior of quantum systems when encountering potential steps that are not rigid. This is important in many applications, such as in the study of semiconductors, where non rigid potential steps play a crucial role in the functioning of electronic devices.

3. How is the solution to the Schrödinger equation for a non rigid step derived?

The solution to this equation is derived using mathematical techniques, such as perturbation theory and boundary conditions. These techniques allow us to approximate the solution and make it easier to solve for complex systems.

4. What are the key factors that affect the solution to the Schrödinger equation for a non rigid step?

The key factors that affect the solution include the shape and height of the potential step, the energy of the quantum system, and the mass of the particle in the system. These factors influence the behavior of the wave function and determine the overall solution.

5. Are there any real-life applications of the solution to the Schrödinger equation for a non rigid step?

Yes, there are many real-life applications of this solution, particularly in the field of semiconductor devices. The behavior of electrons in these devices is governed by non rigid potential steps, and understanding their solution is crucial for the development of efficient and reliable electronic devices.

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