Release date: 2021-10-05
This release brings online the Advantage_system4.1 QPU solver, which includes several enhancements to D-Wave’s quantum processing unit (QPU) technology:
- Higher Yield—This QPU has a higher yield of available qubits and couplers in its working graph than did previous Advantage QPUs: 99.7% (5,627 qubits) with 99.4% of couplers (40,279) available for use. This increased yield greatly improves performance of embedding; for example, the largest clique (fully connected graph) that has been successfully embedded has grown from 119 to 177 nodes (with chain length of 17 qubits).
- Lower Integrated Control Errors (ICE)—Solutions returned from newer QPUs—such as the Advantage_system4.1 system—have relatively lower errors and better scaling for problems.
- Expanded Range of QPU Biases—This release expands the range of biases you can set on Advantage QPUs from the current nominal value of [-2.0, 2.0] to a nominal value of [-4.0, 4.0] (check the h_range property for your QPU solver for exact values).
- Support for Sub-Microsecond Anneals—The annealing time range of this QPU is [0.5, 2000.0] microseconds, as compared with [1.0, 2000.0] for earlier Advantage QPUs.
For detailed QPU performance information (for example, numerical analyses on performance for clique and SAT problems), see the Advantage Performance white paper, which is now updated for the latest Advantage system.
For the physical details specific to this QPU, and for its anneal schedule, see Details of the QPUs Available through Leap and look for the links to Advantage_system4.1 information.