Phase application
Description
Change phase application also in exponential_apply_batch to an application of a phase correction to the boundary. This reduces the number of phase applications to once before and once after the exponential and one phase correction every application of the Hamiltonian.
News snippet
Change phase application to a correction for exponential_apply_batch, leads to a good speed-up of this part.
Checklist
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I have checked that my code follows the Octopus coding standards
Edited by Sebastian Ohlmann