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.
Senthil, Theory of a continuous mott transition in two dimen- sions, Phys
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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.