How can I plot time-dependent wave-functions?

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Discussion Overview

The discussion centers on how to plot time-dependent wave-functions, particularly the wave-function of free particles as a function of both position (x) and time (t). Participants explore various methods and tools for visualizing these functions, including references to multivariable calculus and specific software options.

Discussion Character

  • Exploratory
  • Technical explanation
  • Mathematical reasoning

Main Points Raised

  • One participant suggests that understanding multivariable calculus is essential for plotting wave-functions that depend on both space and time.
  • Another participant mentions using the standard equations of a wave as a guide for plotting and suggests experimenting with tools like Wolfram Alpha for visualizations.
  • Freddy Cisneros shares an attempt to plot the solution to the Schrödinger equation for a free particle using Wolfram, noting that the real and imaginary components do not oscillate vertically with time when x is fixed.
  • Freddy also considers using Python or C for plotting, expressing uncertainty about the programming aspect.

Areas of Agreement / Disagreement

Participants express various approaches and tools for plotting wave-functions, but there is no consensus on the best method or resolution of the issues raised regarding the oscillation of components in the plots.

Contextual Notes

Participants reference the need for knowledge in multivariable calculus and the limitations of certain software tools in visualizing wave-functions accurately. There are unresolved questions about the behavior of the plotted functions.

Freddy Cisneros
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I am trying to plot the wave-function of free particles as a function of x and time. Can someone explain or reference a site which explains how.

--Thank you
 
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So for this, it will be helpful if you understand a bit of multivariable calculus. Since the plot will not only be a function of time, but also a function of space (x,t) so your function now has two variables. We know this for a fact, because we encounter it in our daily lives. (at least we perceive it to be such a fact) Now looking at standard equation of a wave :
wavdes2.gif

We see how a function might change as x, and t changes. But much of the time, one parameter may seem rather arbitrary, and that parameter may be time.

I know that I am getting a bit off topic, but use the standard equations of a wave to guide you on what you want to plot. I believe Wolfram alpha has the ability to plot functions of several parameters if I am not mistaken. Experiment, and have a little fun with it. :)
 
RaulTheUCSCSlug said:
So for this, it will be helpful if you understand a bit of multivariable calculus. Since the plot will not only be a function of time, but also a function of space (x,t) so your function now has two variables. We know this for a fact, because we encounter it in our daily lives. (at least we perceive it to be such a fact) Now looking at standard equation of a wave :
wavdes2.gif

We see how a function might change as x, and t changes. But much of the time, one parameter may seem rather arbitrary, and that parameter may be time.

I know that I am getting a bit off topic, but use the standard equations of a wave to guide you on what you want to plot. I believe Wolfram alpha has the ability to plot functions of several parameters if I am not mistaken. Experiment, and have a little fun with it. :)

Raul,

Thanks, and yeah I have been trying to plot the Solution to the Schrödinger equation for a free particle using Wolfram they have an interactive option where you can play around with the wave. However when plotting
$$\Psi(x,t)=e^{ikx-wt}$$
and I have x fixed, the real and imaginary components do not oscillate vertically with time. Maybe Python will do the trick?

--Freddy Cisneros
 
Freddy Cisneros said:
Raul,

Thanks, and yeah I have been trying to plot the Solution to the Schrödinger equation for a free particle using Wolfram they have an interactive option where you can play around with the wave. However when plotting
$$\Psi(x,t)=e^{ikx-wt}$$
and I have x fixed, the real and imaginary components do not oscillate vertically with time. Maybe Python will do the trick?

--Freddy Cisneros

Damn, yeah maybe python can do the trick, or C. But that goes beyond the realm of my knowledge.
 
RaulTheUCSCSlug said:
Damn, yeah maybe python can do the trick, or C. But that goes beyond the realm of my knowledge.

Thanks Raul, I'll look into it a little deeper.

--Freddy Cisneros
 
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