SVDConfig

class cuquantum.densitymat.SVDConfig(

abs_cutoff: float | None = None,

rel_cutoff: float | None = None,

discarded_weight_cutoff: float | None = None,

max_extent: int | None = None,

)

A data class for SVD truncation policy used by MPS algorithms.

abs_cutoff

Absolute cutoff for singular values. Defaults to 1e-16.

Type:

float | None

rel_cutoff

Relative cutoff. Defaults to 1e-14.

Type:

float | None

discarded_weight_cutoff

Discarded-weight cutoff. Defaults to 0.0.

Type:

float | None

max_extent

Maximum number of singular values retained; 0 means no limit (truncation governed by the cutoffs). Defaults to 0.

Type:

int | None