A Luttinger-Ward analysis of the slave-rotor formalism is developed to compute Green's functions and thermodynamic properties in the U(1) spin liquid phase of the Hubbard model beyond mean-field.
Consequently, the BSE reduces to Gc x′′′, x = Gc,0 x′′′, x + X x′,x′′ Gc,0 x′′′, x′′ t(x′′, x′)Gc x′, x
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Spin liquid phase in the Hubbard model: Luttinger-Ward analysis of the slave-rotor formalism
A Luttinger-Ward analysis of the slave-rotor formalism is developed to compute Green's functions and thermodynamic properties in the U(1) spin liquid phase of the Hubbard model beyond mean-field.