full name: tenpy.simulations.measurement.correlation_length
- tenpy.simulations.measurement.correlation_length(results, psi, simulation, key='correlation_length', unit=None, **kwargs)¶
Measure the correlaiton of an infinite MPS.
results – See
psi – See
simulation – See
key – See
'MPS_sites' | 'MPS_sites_ungrouped' | 'lattice_rings') –
The unit in which the correlation length is returned, see the warning in
- MPS_sites :
Units of the current MPS site
- MPS_sites_ungrouped :
If psi is an MPS upon which
group_sites()was called, this is in units of the ungrouped sites.
- lattice_rings :
In units of lattice “rings” around the cylinder, for correlations along the
- lattice_spacing :
In units of lattice spacings (as defined by the lattice basis vectors!) for correlations, along the cylinder axis (for periodic boundary conditions along y) or along
lattice.basis(for “ladders” with open boundary conditions).
**kwargs – Further keywoard arguments given to