dimod.generators.halfadder_gate#

halfadder_gate(in0: Hashable, in1: Hashable, sum_: Hashable, carry: Hashable, *, strength: float = 1.0) → BinaryQuadraticModel[source]#

Generate a binary quadratic model with ground states corresponding to a half adder gate.

Parameters:

  • in0 – Variable label for one of the inputs.

  • in1 – Variable label for one of the inputs.

  • sum – Variable label for the sum output.

  • carry – Variable label for the carry output.

  • strength – Energy of the lowest-energy infeasible state.

Returns:

A binary quadratic model with ground states corresponding to a half adder gate. The model has four variables and six interactions.

Examples

>>> bqm = dimod.generators.halfadder_gate('a1', 'a2', 's', 'c')
>>> print(dimod.ExactSolver().sample(bqm).lowest())
  a1 a2  c  s energy num_oc.
0  0  0  0  0    0.0       1
1  0  1  0  1    0.0       1
2  1  0  0  1    0.0       1
3  1  1  1  0    0.0       1
['BINARY', 4 rows, 4 samples, 4 variables]