Abstract The automation of ab initio simulations is essential in view performing high-throughput (HT) computational screenings oriented to the discovery novel materials with desired physical properties. In this work, we propose algorithms and implementations that are relevant extend approach beyond density functional theory (DFT), order automate many-body perturbation (MBPT) calculations. Notab...

Abstract We propose a closed-form normalization method suitable for the study of secular dynamics small bodies in heliocentric orbits perturbed by tidal potential planet with orbit external to body. The makes no use relegation, thus circumventing all convergence issues related that technique. is based on convenient book-keeping parameter keeping simultaneously track quantities problem. affects ...

2 The single-particle retarded Green function and its spectral function 4 2.1 Retarded, advanced, “greater”, and “lesser” single-particle Green functions . 4 2.2 The meaning of 〈· · ·〉 and the time dependence . . . . . . . . . . . . . . . . . 5 2.3 Some other forms of the Green functions . . . . . . . . . . . . . . . . . . . . 6 2.3.1 Transformations to other bases . . . . . . . . . . . . . . ....

We present a novel $n$EPT ($n$th-order Eulerian Perturbation Theory) scheme to model the nonlinear density field by summation up $n$th-order fields in perturbation theory. The obtained analytical power spectrum shows excellent agreement with results from all 20 Dark-Quest suites of $N$-body simulations spreading over broad range cosmologies. is much better than conventional two-loop Standard Th...