Abstract The error model of a quantum computer is essential for optimizing algorithms to minimize the impact errors using correction or mitigation. Noise with temporal correlations, e.g. low-frequency noise and context-dependent noise, common in computation devices sometimes even significant. However, conventional tomography methods have not been developed obtaining an describing correlations. ...

To capture all the individual microstructural effects of complex and heterogeneous materials in structural finite element simulations, a two-scale simulation approach is necessary. Since computational effort such simulations extremely high, different methods exist to overcome this problem. In terms FFT-based microscale simulation, one possibility use reduced set frequencies leading numerical so...

The Kerman-Klein formulation of the equations of motion for a nuclear shell model and its associated variational principle are reviewed briefly. It is then applied to the derivation of the self-consistent particle-rotor model and of the self-consistent cranking model, for both axially symmetric and triaxial nuclei. Two derivations of the particle-rotor model are given. One of these is of a form...

A self-consistent method for calculating electron transport through a molecular device is developed. It is based on density functional theory electronic structure calculations under periodic boundary conditions and implemented in the framework of the nonequilibrium Green function approach. To avoid the substantial computational cost in finding the I-V characteristic of large systems, we also de...