Perturbative approach to time-dependent quantum systems and applications to one-crossing multistate Landau-Zener models

R Hu, C Sun - Physical Review A, 2024 - APS
We formulate a perturbative approach for studying a class of multilevel time-dependent
quantum systems with constant off-diagonal couplings and diabatic energies being odd …

Solution to a class of multistate Landau-Zener model beyond integrability conditions

R Hu, F Li, C Sun - Physica Scripta, 2024 - iopscience.iop.org
We study a class of multistate Landau-Zener model which cannot be solved by integrability
conditions or other standard techniques. By analyzing analytical constraints on its scattering …

[PDF][PDF] Solution of a -state Landau-Zener model and applications to Su-Schrieffer-Heeger chains

R Hu, F Li, C Sun - arxiv e-prints, 2023 - researchgate.net
We study a 5-state Landau-Zener model which cannot be solved by integrability methods.
By analyzing analytical constraints on its scattering matrix combined with fitting to results …