High Density Effective Theory Confronts the Fermi Liquid
نویسنده
چکیده
The high density effective theory recently introduced by Hong and Hsu to describe ultradense relativistic fermionic matter is used to calculate the tree-level forward scattering amplitude between two particles at the Fermi surface. While the direct term correctly reproduces that of the underlying gauge theory, the exchange term has the wrong sign. The physical consequences are discussed in the context of Landau’s theoretical description of the Fermi liquid. PACS: 12.38.Aw, 21.65.+f, 24.10.Cn
منابع مشابه
Density and spin-density excitations in normal-liquid He
In bulk Fermi liquids such as liquid He and nuclear matter the quasiparticle effective mass is enhanced at the Fermi surface and reduces to the bare mass far from the Fermi surface. We incorporate this central physical feature into the density and spin-density dynamics of normal-liquid He and obtain good agreement with recent high-resolution neutron-scattering experiments. Existing theories up ...
متن کاملInteracting Electrons and Localized Spins : Exact Results from Conformal Field Theory ∗
Much of traditional condensed matter physics falls under the Fermi liquid paradigm. The notion goes back to Landau and implies that a liquid of fermions (such as He or conduction electrons in a metal) can be treated as a system of essentially free particles [1]. Certain conditions apply: symmetries must remain unbroken and the energies probed should be “small.” But with these provisos the only ...
متن کاملساختار الکترونی ترکیبات فرمیون سنگین M = Co, Rh) PuMGa5 )
Electronic properties of heavy Fermion superconductors PuCoGa5 and PuRhGa5 consisting of density of states, band structure and the Fermi surface have been calculated based on density functional theory in the local spin density approximation plus on site Coulomb correlation (LSDA+U). Calculated density of states is in overall consistency with a photo emission experiment. The bands with f charac...
متن کاملFluctuating spin density waves in metals
Recent work has used a U(1) gauge theory to describe the physics of Fermi pockets in the presence of fluctuating spin density wave order. We generalize this theory to an arbitrary band structure and ordering wavevector. The transition to the large Fermi surface state, without pockets induced by local spin density wave order, is described by embedding the U(1) gauge theory in a SU(2) gauge theor...
متن کاملEffective Field Theories, Landau-Migdal Fermi-Liquid Theory and Effective Chiral Lagrangians for Nuclear Matter∗
We reinterpret Landau-Migdal Fermi-liquid theory of nuclear matter as an effective chiral field theory with a Fermi surface. The effective field theory is formulated in terms of a chiral Lagrangian with its mass and coupling parameters scaling a la Brown-Rho and with the LandauMigdal parameters identified as the fixed points of the field theory. We show how this mapping works out for response f...
متن کامل