Tag: Thermal
Noise-canceling method computes finite-temperature elastic constants
What the study found The study shows that elastic constants, which are central material properties, can be computed at finite temperature in both thermally ordered and disordered systems using a noise-cancellation approach. Why the authors say this matters The authors say this matters because finite-temperature calculations often have poor signal-to-noise ratios, strong anharmonic effects, or…
Conic optimization tightened thermal bootstrap bounds in large-N matrix models
What the study found The study found that thermal bootstrap bounds for large-N matrix quantum mechanics can be improved without logarithmic relaxation by using a Quantum Information Conic Solver. In the one-matrix case, the stricter bounds gave a value for the first long string excited energy that is within 0.001% of the physical value. Why…
ROM-based data assimilation improved solar chimney temperature estimation
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in EngineeringWhat the study found A reduced-order data assimilation framework was able to reconstruct dynamic temperature fields in an inclined phase change material (PCM)-integrated solar chimney. The authors report that this approach also improved the estimation of airflow outlet velocity. Why the authors say this matters The authors state that the method is intended to improve…
Method speeds up TDDFT calculations for XRTS analysis
What the study found The study found a broadly applicable method for improving the efficiency of time-dependent density functional theory (TDDFT) calculations used to model X-ray Thomson scattering (XRTS) and related dynamic material properties. The authors report speed-ups of up to an order of magnitude without introducing any significant bias. Why the authors say this…
Thermal tuning enables directional broadband acoustic absorption
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in AcousticsThermal control of air properties enables broadband, direction-dependent acoustic absorption in a programmable non-Hermitian metastructure without geometric modifications.
Formal expressions for reduced densities in thermofield dynamics
Framework for computing reduced density matrices and Wigner distributions in thermofield dynamics using inverse Bogoliubov transformations, with applications to thermal quantum systems.
Inner cladding alters predicted TMI threshold in fiber amplifiers
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in OpticsInvestigate transverse mode instability in high-power Yb-doped fiber amplifiers using a three-layer optical-thermal model with stimulated thermal Rayleigh scattering analysis.
