Composites

Samplers can be composed. The composite pattern allows layers of pre- and post-processing to be applied to binary quadratic programs without needing to change the underlying sampler implementation.

We refer to these layers as composites. A composed sampler includes at least one sampler and possibly many composites.

dwave-system provides dimod composites for using the D-Wave system.

For example, the D-Wave system is Chimera-structured (a particular architecture of sparsely connected qubits) and so any arbitrarily posed binary quadratic problem requires mapping, called minor embedding, to a Chimera graph that represents the system’s quantum processing unit. This preprocessing can be done by a composed sampler consisting of the DWaveSampler and a composite that performs minor-embedding.

Release:0.2.3 Date:Apr 02, 2018

• EmbeddingComposite
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  • Sampler Properties
  • Composite Properties
  • Methods
• TilingComposite
  • Class
  • Sampler Properties
  • Composite Properties
  • Structure Properties
  • Methods
• VirtualGraphComposite
  • Class
  • Sampler Properties
  • Composite Properties
  • Structure Properties
  • Methods