Revealing Non-equilibrium and Relaxation in Warm Dense Matter

Abstract

Experiments creating extreme states of matter almost invariably create non-equilibrium states. These are very interesting in their own right but need to be understood even if the ultimate goal is to probe high-pressure or high-temperature equilibrium properties like the equation of state. Here, we report on the capabilities of the newly developed imaginary time correlation function (ITCF) technique [1] to detect and quantify non-equilibrium in pump-probe experiments fielding time resolved x-ray scattering diagnostics. We find a high sensitivity of the ITCF even to a small fraction of non-equilibrium electrons in the Wigner distribution. The behavior of the ITCF technique is such that modern lasers and detectors should be able to trace the non-equilibrium relaxation from tens of femto-seconds to several 10s of picoseconds without the need for a model.

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Cited by in corpus (6)

• First principles simulations of dense hydrogen
• Model-free Rayleigh weight from x-ray Thomson scattering measurements
• Averaging over atom snapshots in linear-response TDDFT of disordered systems: A case study of warm dense hydrogen
• Modelling of warm dense hydrogen via explicit real time electron dynamics: Dynamic structure factors
• Excitation signatures of isochorically heated electrons in solids at finite wavenumber explored from first principles
• Ultrafast Heating Induced Suppression of $d$-band Dominance in the Electronic Excitation Spectrum of Cuprum