Abstract Liquid 4He and 3He are the purest Brose and Fermi liquids currently available in
nature. Understanding the dynamics and excitations of those quantum systems is a …

A nonequilibrium Green's functions approach to the collective response of correlated
Coulomb systems at finite temperatures is presented. It is shown that solving Kadanoff-Baym …

Dynamical properties of uniform electron fluids are studied within a nonperturbative
approach consisting in the combination of the self-consistent version of the method of …

The quantum-mechanical version of the Singwi-Tosi-Land-Sjölander (STLS) approximation
is applied to finite temperatures. This approximation has two main advantages. First, it …

Superfluidity in electron-hole bilayers in graphene and GaAs has been predicted
theoretically many times but not yet definitively observed. A key controversy is the correct …

We present a detailed study of the dynamical electronic response in bulk sodium and
aluminum within time-dependent density-functional theory (TDDFT). The poor results of the …

The dynamic structure factor S (q, ω) of electrons in Li-metal single crystals for q∥[100],
q∥[110], and q∥[111] with 0.28 au< q< 1.4 au was measured with 1-eV resolution by using …

We present the first measurements of the dynamic structure factor of lithium and sodium in
the liquid and solid phases, in the intermediate-q regime. The overall shape of the response …

Based on a highly self-consistent theory maintaining the exact functional relations between
the self-energy and the vertex part, we evaluate the dynamical structure factor S (q, ω) of the …

A gauge-invariant Wigner quasi-distribution function for charged particles in classical
electromagnetic fields is derived in a rigorous way. Its relation to the axial gauge is …