ROQAM formulates Green's function estimation via orthogonal polynomials to preserve Hessenberg structure under finite precision, enabling lower precision with depth and outperforming QSVD by orders of magnitude in resource estimates for a quantum impurity model.
Electronic density response of warm dense matter
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XRTS benchmark on warm dense Al demonstrates that uniform-electron-gas models overestimate plasmon resonance energy by up to 8 eV while ab initio calculations including disorder agree with experiment.
The paper reviews the use of the imaginary-time correlation function to extract temperature, normalization, and Rayleigh weight from XRTS spectra without model dependence.
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Estimating Green's functions with a robust quantum Arnoldi method
ROQAM formulates Green's function estimation via orthogonal polynomials to preserve Hessenberg structure under finite precision, enabling lower precision with depth and outperforming QSVD by orders of magnitude in resource estimates for a quantum impurity model.
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A Momentum-Resolved X-ray Thomson Scattering Benchmark of Electronic-Response Models in Warm Dense Aluminium
XRTS benchmark on warm dense Al demonstrates that uniform-electron-gas models overestimate plasmon resonance energy by up to 8 eV while ab initio calculations including disorder agree with experiment.
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Model-free interpretation of X-ray Thomson scattering measurements
The paper reviews the use of the imaginary-time correlation function to extract temperature, normalization, and Rayleigh weight from XRTS spectra without model dependence.