Find Particle Given Wavefunction: Probability Amplitude & Exponential Decay

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SUMMARY

The discussion focuses on determining the most probable location of a particle based on its wavefunction, which is defined as the probability amplitude. The square modulus of the wavefunction provides the probability density, and the probability of finding a particle in a specific interval is calculated using the square modulus multiplied by delta x. It is established that the particle is most likely found where the probability amplitude reaches its maximum. Additionally, in three-dimensional scenarios, one must consider radial wave functions and plot rR(r) to accurately assess the probability distribution.

PREREQUISITES
  • Understanding of wavefunctions in quantum mechanics
  • Knowledge of probability density and probability amplitude
  • Familiarity with the concept of radial wave functions
  • Basic calculus for integrating probability over intervals
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  • Learn about the calculation of probability densities from wavefunctions
  • Explore the implications of radial wave functions in three dimensions
  • Investigate the mathematical techniques for plotting probability distributions
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Students and professionals in quantum mechanics, physicists analyzing wavefunctions, and anyone interested in understanding particle localization based on probability amplitudes.

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Homework Statement


Where is the particle most likely to be found given the wavefunction in the diagram
Also the wavefunction decays exponentially as x goes to infinty

Homework Equations


well the wavefunction is the probability amplitude
the square modulus of the wavefunction gives the probability desnity
and the square modulus times delta x gives the probability of finidng a particle bewtween x and x + delta x


The Attempt at a Solution


i think it is most likely to be fond where the probability amplitude is maximum because at those regions the particle has maximum proabiltiy of being found

is this correct??

thanks for your help!
 

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stunner5000pt said:

Homework Statement


Where is the particle most likely to be found given the wavefunction in the diagram
Also the wavefunction decays exponentially as x goes to infinty

Homework Equations


well the wavefunction is the probability amplitude
the square modulus of the wavefunction gives the probability desnity
and the square modulus times delta x gives the probability of finidng a particle bewtween x and x + delta x


The Attempt at a Solution


i think it is most likely to be fond where the probability amplitude is maximum because at those regions the particle has maximum proabiltiy of being found

is this correct??

thanks for your help!

Yes

In 3-D you do have to be careful with radial wave funcions. The usual thing is to plot rR(r) because R(r) itself is not sufficient to find the most likely r. That's bcause a particle can be found at one value of r and be anywhere in a shell of radius r and thickness dr. The volume of the shell increases in proportion to the area of a sphere, or as r²
 

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