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Studying the jellium model in the Hartree-Fock approximation, Overhauser hasshown that spin density waves (SDW) can lower the energy of the Fermi gas, butit is still unknown if these SDW are actually relevant for the phase diagram.In this paper, we give a more complete description of SDW states. We show thata modification of the Overhauser ansatz explains the behavior of the jellium athigh density compatible with previous Hartree-Fock simulations.

Upper bounds of spin-density wave energies in the homogeneous electron gas