The Symmetries of Fermion Fluids at Low Dimensions
Philip W. Anderson, F. Duncan M. Haldane
Abstract
We point out that the quasiparticle spectrum of the Landau Fermi liquid theory has an extra Z2 symmetry, local in momentum space, which is not generic to the Hamiltonian with interactions. Thus the Fermi liquid is in this sense a (quantum) zero-temperature critical point.
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