Solver Decommissioning

As we prepare to release Advantage, our next generation quantum computer, we will be taking the DW2000Q_2_1 solver offline. The lower noise DW2000Q_5 solver will still be available.

You may be wondering what this means for you, as a developer. Your QPU access will not be impacted, as we have ensured there will be enough systems online and available to sustain the growing usage.


To ensure you can still access the QPU you may need to refactor your project or setup by

  1. Replacing hard coded sampler calls in your code to feature-based solver selection
  2. Changing the default solver in your dwave.conf file to DW2000Q_5 so you can call samplers without input parameters (ex. sampler = DWaveSampler() )

For example, to refactor a hard coded sampler call you would change

sampler = DWaveSampler(solver='DW_2000Q_2_1')


sampler = DWaveSampler(solver={'qpu': True})

Here is more information on setting up your configuration file for feature-based solver.


One other change to note is that the Diverse Solutions Jupyter Notebook will be obsolete once the DW2000Q_2_1 solver is taken offline. The Notebook compares performance between the DW2000Q_2_1 and DW2000Q_5 (lower-noise) quantum processors. Once the DW2000Q_2_1 solver is taken offline, the Diverse Solutions Notebook will be available as a web page, but you will not be able to run it as a notebook anymore. 

Please don't hesitate to reach out if you encounter any difficulties with these changes.

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