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From black holes to strange metals
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From black holes to strange metals
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Since the mid-eighties there has been an accumulation of metallic materials whose thermodynamic and transport properties differ significantly from those predicted by Fermi liquid theory. Examples of these so-called non-Fermi liquids include the strange metal phase of high transition temperature cuprates, and heavy fermion systems near a quantum phase transition. We report on a class of non-Fermi liquids discovered using gauge/gravity duality. The low energy behavior of these non-Fermi liquids is shown to be governed by a nontrivial infrared (IR) fixed point which exhibits nonanalytic scaling behavior only in the temporal direction. Within this class we find examples whose single-particle spectral function and transport behavior resemble those of strange metals. In particular, the contribution from the Fermi surface to the conductivity is inversely proportional to the temperature. In our treatment these properties can be understood as being controlled by the scaling dimension of the fermion operator in the emergent IR fixed point.
Forward citations
Cited by 4 Pith papers
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Holographic Learning from Fermionic Spectra: Application to Strange Metal Phenomenology
Neural ODEs learn that normalized low-T cuprate PLL spectra are well described by conformal-to-AdS2 black holes with nearly vanishing gauge potential, while thermodynamics remain invisible to the massless probe.
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Holographic Learning from Fermionic Spectra: Application to Strange Metal Phenomenology
A Neural-ODE framework reconstructs effective black-hole metric functions and gauge potential from fermionic spectral functions, validates on known holographic models, and shows low-temperature cuprate strange-metal s...
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Analytical and Numerical Study of Quartic Nonlinear Electrodynamics in Holographic Fermion Systems
An F^4-deformed bulk gauge field raises the chemical potential, lowers T/μ, shifts the Fermi momentum upward, and sharpens the holographic spectral peak without destroying the Fermi surface.
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Tracking Entanglement Transfer: Emergence of Thermodynamics from Quantum Information
Tuning the coupling ratio in a two-qubit Heisenberg model coupled to a fermionic bath induces entanglement redistribution whose mutual information measures parallel the Page curve and yield an effective temperature sc...
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