2 papers
math-ph2026
Error bounds for the truncated Baker--Campbell--Hausdorff and Zassenhaus formulas in unitary problems
A. Arnal, F. Casas, J. L. Ruiz-Benito
The Baker--Campbell--Hausdorff (BCH) formula plays a critical role in many branches of mathematics and physics. It expresses the logarithm of the product of exponentials of non-com…
quant-ph2025
Approximating exponentials of commutators by optimized product formulas
F. Casas, A. Escorihuela-Tomà s, P. A. Moreno Casares
Trotter product formulas constitute a cornerstone quantum Hamiltonian simulation technique. However, the efficient implementation of Hamiltonian evolution of nested commutators rem…