Exponential unitary integrators for nonseparable quantum Hamiltonians

Maximilian Ciric, Denys I. Bondar, Ole Steuernagel

Quantum Hamiltonians containing nonseparable products of non-commuting operators, such as ${\hat{\mathbf{x}}}^m{\hat{\mathbf{p}}}^n$, are problematic for numerical studies using split-operator…