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Mar 4, 2014 at 21:09 vote accept m.mybo
Mar 1, 2014 at 19:09 answer added joshphysics timeline score: 6
Mar 1, 2014 at 15:42 comment added JeffDror @m.mybo: I'm likely missing something (I'm not an expert at all in Stat Mech) but wouldn't a state with no fermions have $\epsilon_0=0$ and hence both forms of the partition function are equivalent?
Mar 1, 2014 at 14:29 comment added Nanite You are using the canonical ensemble, which means that you can only get Fermi Dirac statistics after making some approximations. Your derivation will probably also be long and ugly. You can keep using the density matrix formalism but consider switching to Fock space and the grand canonical ensemble, where Fermi Dirac statistics are exactly derivable in about two lines.
Mar 1, 2014 at 13:53 history edited Qmechanic CC BY-SA 3.0
It seems the homework tag applies even if it is not actual homework
Mar 1, 2014 at 12:56 comment added A. Kennard This might help: physics.stackexchange.com/q/18576
Mar 1, 2014 at 12:33 history asked m.mybo CC BY-SA 3.0