QuadraticModel.add_quadratic_from(quadratic: Mapping[Tuple[Hashable, Hashable], float | floating | integer] | Iterable[Tuple[Hashable, Hashable, float | floating | integer]])[source]#

Add quadratic biases.


quadratic – Interactions and their associated quadratic biases, as either a dict of form {(u, v): bias, ...} or an iterable of (u, v, bias) triplets, where u and v are variables in the model and bias is the associated quadratic bias. If the interaction already exists, the bias is added.

  • ValueError – If a specified variable is not in the model.

  • ValueError – If any self-loops are given on binary-valued variables. E.g. (u, u, bias) is not a valid triplet for spin variables.