QED at a finite chemical potential [PDF]
R. NarayananWe consider multi-flavor QED on a finite lattice at a finite chemical potential. We show that the partition function only depends on the variables, $(\frac{\mu_i}{q_i} -\frac{\mu_1}{q_1})$, for $i=2,...$, where $q_i$, $i=1...$ are integer valued charges of the various flavors and $\mu_i$, $i=1...$ are the dimensional chemical potentials of the various flavors.View original: http://arxiv.org/abs/1206.1489
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