dwave.system.samplers.DWaveSampler.sample_qubo

DWaveSampler.sample_qubo(Q, **kwargs)

Sample from the provided QUBO.

Parameters:

• Q (dict) – Coefficients of a quadratic unconstrained binary optimization (QUBO) model.
• **kwargs – Optional keyword arguments for the sampling method, specified per solver in DWaveSampler.parameters

Returns:

dimod.Response

Examples

This example creates a DWaveSampler based on a D-Wave solver selected by the user’s default D-Wave Cloud Client configuration file and submits a simple QUBO problem of just two variables that map to coupled qubits 0 and 4 on the example system. (The simplicity of this example obviates the need for an embedding composite—the presence of qubits 0 and 4, and their coupling, on the selected D-Wave system can be verified manually.)

>>> from dwave.system.samplers import DWaveSampler
>>> sampler = DWaveSampler()
>>> Q = {(0, 0): -1, (4, 4): -1, (0, 4): 2}
>>> response = sampler.sample_qubo(Q)
>>> for sample in response.samples():    
...    print(sample)
...
{0: 0, 4: 1}