How to Calculate Heat Capacity of One-Dimensional Anharmonic Oscillator?

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Hi,

I want to calculate heat capacity of anharmonic oscillator in one dimension. Does anyone have an idea?

Thanks...
 
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Yes before I have found any solution way I posted here but then I realized there is a forum for homework questions and I also posted there. Anyway I have found a solution:
Here:
http://cer.ucsd.edu/~james/notes/phys210a/hmwk1sol.pdf"
question 3.29
 
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