CEA Gramat

Householder Tridiagonalization as Preprocessing for the Jacobi Eigenvalue Algorithm

Householder tridiagonalization is not normally used before a Jacobi eigensolver because the reduction costs O(n³), while subsequent Jacobi rotations do not preserve the zeros it creates. We show that this argument does not settle whether preprocessing can nevertheless reduce the...

Probing electron transport and thermodynamic properties in expanded warm dense matter

The expanded warm dense matter regime, an intermediate state between condensed matter and high-energy-density plasma at low density, remains poorly constrained experimentally, particularly regarding transport properties across the metal-to-nonmetal transition. Here, we explore ex...