What is the ground state of a particle with mass 'm' and potential V(x) = x^2?

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Homework Help Overview

The discussion revolves around determining the ground state of a particle with mass 'm' in a potential described by V(x) = x^2, which is related to the quantum harmonic oscillator model.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • The original poster considers using the Hamiltonian operator and draws parallels to the harmonic oscillator potential. They express uncertainty about their approach and calculations related to energy levels.

Discussion Status

Participants are actively engaging with the problem, with some providing guidance on the relationship to the harmonic oscillator. There is acknowledgment of the need to understand the problem thoroughly, suggesting a productive direction in the discussion.

Contextual Notes

There is an emphasis on ensuring a foundational understanding of the problem, as indicated by a participant's reminder to approach it from scratch. This suggests a focus on learning rather than simply arriving at an answer.

Reshma
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A particle has mass 'm' and potential [itex]V(x) = x^2[/itex]. Find the ground state of this wavefunction.

Should I use the Hamiltonian operator here?
 
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Yes. You should get something very similar to the harmonic oscillator.
 
Thanks, inha! I compared it to the PE function of a harmonic oscillator.

[tex]V(x) = {1\over 2} m \omega^2 x^2[/tex]

Comparing it with [itex]V(x) = x^2[/tex],<br /> <br /> [tex]{1\over 2} m \omega^2 = 1[/tex]<br /> <br /> [tex]\omega = \sqrt{2\over m}[/tex]<br /> <br /> And I substitute this value in the formula:<br /> [tex]E_n = \hbar \omega \left(n + {1\over 2}\right)[/tex]<br /> <br /> Am I going right? <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f615.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":confused:" title="Confused :confused:" data-smilie="5"data-shortname=":confused:" />[/itex]
 
Reshma said:
Thanks, inha! I compared it to the PE function of a harmonic oscillator.

[tex]V(x) = {1\over 2} m \omega^2 x^2[/tex]

Comparing it with [itex]V(x) = x^2[/tex],<br /> <br /> [tex]{1\over 2} m \omega^2 = 1[/tex]<br /> <br /> [tex]\omega = \sqrt{2\over m}[/tex]<br /> <br /> And I substitute this value in the formula:<br /> [tex]E_n = \hbar \omega \left(n + {1\over 2}\right)[/tex]<br /> <br /> Am I going right? <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f615.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":confused:" title="Confused :confused:" data-smilie="5"data-shortname=":confused:" />[/itex]
[itex] <br /> It looks good (Of course, n=0 for the ground state, don't forget that!), but make sure you know how to do the problem from scratch. I'm guessing that's what your professor wanted you to do.<br /> <br /> -Dan[/itex]
 

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