Changelog

v0.12.0 (Nov. 21, 2023)

Support Amplify QAOA v0.4.
Change the default value of set_penalty_binary_polynomial and set_inequalities of Fujitsu DA4 clients to True.
Improve compatibility with DA3/DA4 one/two-way one-hot groups.
Support D-Wave Advantage_system6.2 (v0.11.2).
[Removed] Drop support for CentOS 8 due to EOL.
[Removed] Drop support for Ubuntu 18.04 due to EOL.

Enable to select relaxation method for construction of inequality constraints [ref].
Input/output of quadratic models with LP file format and QPLIB file format [ref].
Support Amplify Annealing Engine version 0.7 on FixstarsClient [Changelog].

Add QAOA Solver clients with IBM Quantum and Qulacs [ref].
Support D-Wave Advantage_system6.1.
Support D-Wave Advantage2_prototype1.1 (v0.8.1).
Enable to get the runtime or API version string from version property of each client class.
[Removed] Drop support for Python 3.6 due to EOL.
[Removed] Drop support for Ubuntu 16.04 due to EOL.

Improve performance.
Support Python 3.10.
Support Amplify Annealing Engine version 0.6 on FixstarsClient [Changelog].
Support ABS QUBO Solver on ABSClient [ref] (experimental).
Support Gurobi Optimizer on GurobiClient [ref].
Enable to select integer encoding method for construction of inequality constraints [ref].
Enable to change correspondence of variables for to_Binary() and to_Ising() methods [ref].
Add degree() function and related [ref].
Add execution_time property to Solver [ref].
Add options to client classes to save request/response data to a specified file.
[Deprecated] annealing_time_ms is deprecated.
[Removed] Remove LogicPoly class and related functions. Logic operations are ported to BinaryPoly [ref].

Improve stability
Add Polynomial Array class for effective and fast polynomial formulations.
Add one_hot() function as an alias of equal to 1 constraint [ref].
Enable to select quadratization method for construction of BinaryQuadraticModel [ref].
Support FujitsuDA3Solver on FujitsuDA3SolverClient. See example [ref].
Support Apple M1.
Support D-Wave specifications after September 2021 (v0.6.3).
Support D-Wave Advantage_system4.1 (v0.6.5).

Support Amplify Annealing Engine version 0.5 on FixstarsClient [Changelog].
Add parameter of customized constraint satisfaction condition to penalty() function [ref].
Add label property to BinaryConstraint (and related objects) [ref].
D-Wave SAPI client (DWaveClient) is deprecated. Use D-Wave Sampler client (DWaveSamplerClient) instead.

No license file required anymore
Set default url parameter of Fixstars client
Add proxy property to Fixstars, Fujitsu, Hitachi and Toshiba clients.
Add greater_equal() function to create greater than or equal to constraint [ref].
Add clamp() function to create clamping a value between a pair of boundary values constraint [ref].
Accept BinaryConstraint (and related objects) as arguments of solve().
Remove deprecated properties from timing information of D-Wave QPU

Improve performance of Polynomial construction.
Support D-Wave Advantage 1.1 quantum system on DWaveSamplerClient. See example [ref].
Support Simulated Bifurcation Machine version 1.4 on ToshibaClient.
Add is_feasible attribute to SolverSolution, which represents whether the solution is feasible or not.
Add check_constraints() method to check if the constraints of the QuadraticModel are satisfied with the given solution [ref].
Add filter_solution property to Solver class. Set True to get only feasible solutions [ref]. Defaults to True.
Add deduplicate property to Solver class. Set True to deduplicate among the identical solutions [ref]. Defaults to True.
Add sort_solution property to Solver class. Set True to sort solutions by their energy values [ref].
Add iterator methods for ClientResult, LogicalResult and SolverResult
Support Python 3.9.

Improve performance.
Add HitachiClient for Hitachi CMOS annealing machine type 4.
Add less_equal() function to create less than or equal to constraint [ref].
Add conversions between Matrix class and numpy array [ref].
Add constant() method to get the constant term of Polynomial [ref].
Add asdict() method to convert the polynomial to Python dictionary [ref].
Add compressed data transfer options in parameters for Amplify Annealing Engine client. Defaults to True.