Vertex corrections to nonlocal correlation functions vanish at zero wavevector under inversion symmetry and for quadratic dispersions at all wavevectors, with explicit expressions for density, current, and stress responses derived for both Fermi and non-Fermi liquids under local self-energies and En
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Umklapp scattering near the zone boundary adds an Ω^{1/2} or Ω^{2/3} contribution to the particle-hole bubble in 2D Ising-nematic criticality, potentially shifting the onset of linear-in-T resistivity from Δ_q^3 to Δ_q^4 in one hyper-specific temperature regime.
The 2D Yukawa-SYK model supplies a microscopic theory of quantum-critical incoherent metals featuring a non-Boltzmann resistivity-quasiparticle lifetime relation plus violations of the Mott-Ioffe-Regel and Kovtun-Son-Starinets bounds.
citing papers explorer
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The flow of local quantum fluids: Conservation laws and vertex corrections from many-body linear-response theory with local self-energy
Vertex corrections to nonlocal correlation functions vanish at zero wavevector under inversion symmetry and for quadratic dispersions at all wavevectors, with explicit expressions for density, current, and stress responses derived for both Fermi and non-Fermi liquids under local self-energies and En
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Umklapp correction to Landau damping and conditions for non-trivial modifications to quantum critical transport
Umklapp scattering near the zone boundary adds an Ω^{1/2} or Ω^{2/3} contribution to the particle-hole bubble in 2D Ising-nematic criticality, potentially shifting the onset of linear-in-T resistivity from Δ_q^3 to Δ_q^4 in one hyper-specific temperature regime.
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Universal Theory of Incoherent Metals
The 2D Yukawa-SYK model supplies a microscopic theory of quantum-critical incoherent metals featuring a non-Boltzmann resistivity-quasiparticle lifetime relation plus violations of the Mott-Ioffe-Regel and Kovtun-Son-Starinets bounds.