How to Approximate Potential Energy for a Linear Harmonic Oscillator?

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SUMMARY

The forum discussion focuses on approximating the potential energy function for a linear harmonic oscillator defined by the equation V = a/x^2 + b x^2. The key steps include identifying the minima of the function, which occurs at x = ±(a/b)^(1/4) when both a and b are greater than zero. The potential energy function should be expanded using a Taylor series around this minimum point, retaining terms up to x^2. It is crucial to note that the function is undefined at x=0, making it an inappropriate equilibrium point.

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Homework Statement



Find the linear harmonic oscillator approximation for potential energy function:

[tex]\ V=[/tex][tex]\frac{a}{x^2}+[/tex][tex]\ b[/tex][tex]\ x^2[/tex]

Homework Equations



The Attempt at a Solution



The 2nd term will be present in the expression of V(approx).But what about the first term. Should we make it {1+(x-1)} and expand binomially?But that would involve two points of eqlbm---one is 0 and the other is 1...

Can anyone please help?
 
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You have to find the minimum first. If both a,b>0, then the minima occur at x= +-(a/b)^1/4. Take the +ve value, say. Expand the function as a Taylor series around that point and retain up to the x^2 term.

Note that the function is not defined at x=0, and approaches infinity as x tends to zero. Why were you thinking of x=0 as an equilibrium point?
 
Why were you thinking of x=0 as an equilibrium point?

Yes,I really made a mistake in undestanding the problem.Now, I can do it.Thank you very much.
 

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