Quick Reference Tables

This section provides two quick reference tables: Properties and Parameters Summary by Solver Type and QPU Solver Parameters Matrix.

Properties and Parameters Summary by Solver Type

The following table summarizes the properties and parameters of each solver described above. For release-specific details of QPU solver parameters, see QPU Solver Parameters Matrix.

Note

Not all accounts have access to all solver types.

Solver Type	Properties	Parameters
QPU and VFYC solvers	anneal_offset_ranges anneal_offset_step anneal_offset_step_phi0 annealing_time_range category chip_id couplers default_annealing_time default_programming_thermalization default_readout_thermalization extended_j_range h_gain_schedule_range h_range j_range max_anneal_schedule_points max_h_gain_schedule_points num_qubits num_reads_range parameters per_qubit_coupling_range problem_run_duration_range qubits quota_conversion_rate readout_thermalization_range supported_problem_types New Solver Property: tags topology vfyc	anneal_offsets anneal_schedule annealing_time answer_mode auto_scale beta chains flux_biases flux_drift_compensation h_gain_schedule initial_state max_answers num_reads num_spin_reversal_transforms postprocess programming_thermalization readout_thermalization reduce_intersample_correlation reinitialize_state
Optimizing emulators	couplers num_qubits num_reads_range parameters qubits supported_problem_types	answer_mode max_answers num_reads
Sampling emulators	beta_range couplers default_beta num_qubits num_reads_range parameters qubits supported_problem_types	answer_mode beta max_answers num_reads random_seed

Solver Type	Properties	Parameters
Hybrid solvers	time_limit	category maximum_number_of_variables maximum_time_limit_hrs minimum_time_limit quota_conversion_rate supported_problem_types

Solver Type	Properties	Parameters
Ising heuristic solvers	supported_problem_types	iteration_limit local_stuck_limit max_bit_flip_prob max_local_complexity min_bit_flip_prob num_perturbed_copies num_variables random_seed time_limit_seconds

QPU Solver Parameters Matrix

The following table summarizes the QPU solver parameters, identifies on what platform and in what release they are available, provides guidelines on how parameters interact with each other and on timing,[1] and gives their default settings.

Notice that some parameters are not supported on D-Wave 2X and earlier platforms. Always check solver properties when using a new parameter.

[1]	For more information on timing, see Solver Computation Time.

Table 5 QPU Solver Parameters Matrix

Parameter	Pltfrm./ Rel.	Parameter Compatibility	Timing Impact?	Default
anneal_offsets	2000Q, 2.5+		No	No offsets.
anneal_schedule	2000Q, 2.11+	Incompatible with annealing_time. Use with initial_state and reinitialize_state for reverse annealing.	Yes	No variation to the standard anneal schedule.
annealing_time	All	Incompatible with anneal_schedule.	Yes	Check properties.
answer_mode	All		No	histogram
auto_scale	All	Incompatible with flux_biases and extended \(J\) range.	Yes	true
beta	All		No	Check properties. For the VFYC solver, this is 10.
chains	All	Use with postprocess.	No	No chains.
flux_biases	2000Q, 3.0+	Incompatible with auto_scale and num_spin_reversal_transforms.	No	No offsets.
flux_drift_compensation	2000Q, 3.0+		No	true
h	All		No	No bias.
h_gain_schedule	2000Q	Use with anneal_schedule.	No	1
initial_state	2000Q, 3.0+	Use with anneal_schedule for reverse annealing. Incompatible with annealing_time.	Yes	No initial state.
J	All		No	No coupling.
max_answers	All		No	num_reads
num_reads	All	The web server supports up to 1000 reads. Ocean client support up to 10,000.	Yes	1
num_spin_reversal_transforms	All	Incompatible with reverse annealing, flux_biases, and extended \(J\) range.	Yes	0
postprocess	All	Use with chains.	Yes	None.[2]
programming_thermalization	All		Yes	Check properties.
Q	All		No	N/A
qaot	All		Yes	Introduced by the system. Roughly 1 ms.
reduce_intersample_correlation	2000Q, 3.0+		Yes	false
readout_thermalization	All		Yes	Check properties.
reinitialize_state	2000Q, 3.0+	Use with initial_state and reinitialize_state for reverse annealing.	Yes	true

[2]	The VFYC solver always runs postprocessing; its default is sampling.