See http://grephysics.net/ans/9277/73

I can't figure why the partition function has $\epsilon$and $2\epsilon$: how does Yosun get from $e^{-E_1/kT}(1+e^{-\epsilon/kT})$ to his partition function with $2\epsilon$?

Thanks!

## GR9277 #73

### Re: GR9277 #73

It should be E_1 and E_2 instead of \epsilon and 2\epsilon. The partition function is simply e^{-E_1/kT} + e^{-E_2/kT}.