# [latest]¶

## Release Notes¶

Implement the W_I and W_II method for approximating exponentials of an MPO with an MPO, and MPS compression / MPO application to an MPS, to allow time evolution with ExpMPOEvolution().

## Changelog¶

### Backwards incompatible changes¶

• tenpy.models.lattice.Lattice.plot_basis() now allows to shade the unit cell and shift the origin of the plotted basis.
• Don’t use bc_shift in tenpy.models.lattice.Lattice.plot_couplings() any more - it lead to confusing figures. Instead, the new keyword wrap=True allows to directly connect all sites. This is done to avoid confusing in combination with plot_bc_identified().