Changelog

Fixed

• Fix control flow register mapping in BasisTranslator (#15156)
• Fix textdrawer for controlflow with different regs (#15155) (#15162)
• Check target gates are parameterized in optimize1qgatesdecomposition (#15141)
• Fix HLS for custom gate calibrations (#15137)
• Fix display of anonymous bits (#15132)

Changelog

Fixed

• Fix ApplyLayout with empty layout (backport #14606) (#14615)
• Fix QASM3 export of Delay with 'ps' units. (backport #14895) (#14897)
• Fix ElidePermutations pass in the presence of PermutationGates (#14603) (#14622)
• Fix random number generator seed argument for quantum_volume (#14586) (#14590)
• Avoid using rustworkx 0.16.0 methods in vf2_utils (backport #14513) (#14533)
• Fix behavior of HLS plugins after preserve_order=False (backport #14539) (#14547)
• allows string values in assign_parameters with strict=False (#14365) (#14553)
• Fix Sabre rebuild with nested Var and Stretch (backport #14488) (#14493)
• Fixed AND terms for OR in quantum_or.py (backport #14436) (#14477)
• Fix more spurious complex parts in circuit functions (#14431) (#14438)

Changelog

Fixed

• Bug fixes in Solovay Kitaev Decomposition (backport #14217) (#14294)
• Fix qpy for MCMTGate (#14096) (#14325)
• Fix incorrect error estimation in VF2 fallback (#14218) (#14315)
• Fix caching logic in SolovayKitaevSynthesis plugin (#14304) (#14312)
• Fix circuit-metadata propagation in SabreLayout (backport #14186) (#14190)
• Fix handling of custom gates named unitary in Split2qUnitaries (#14108)
• Fix global phase update in BasisTranslator Pass (backport #14078) (#14091)
• Fix deepcopy/pickle of DAGCircuit variable IO nodes (backport #14041) (#14043)

Changelog

Fixed

• Introduce custom sympy srepr parser [stable/1.4] (#14022)
• Preserve bit locations through pickle (#13981)
• fix missing inverse definitions in generate_basis_approximations (#13517) (#13964)

Changelog

Fixed

• Fix qpy serialization of substitution of type ParameterExpression (backport #13890) (#13943)
• Propagate DAGCircuit.name in ApplyLayout (#13910) (#13920)

Release notes: https://docs.quantum.ibm.com/api/qiskit/release-notes/1.4#140

Changelog

Deprecated

• Address BackendV1 deprecation warning oversights (#13868)
• The unused parameter dag in DAGNode constructor is deprecated (#13862)
• Deprecate convert_to_target (#12915)
• Deprecate qiskit.circuit.classicalfunction (#13786)
• Deprecate use of BackendProperties (BackendV1) in transpilation pipeline (#13719)
• Deprecate NormalizeRXAngle and rzx_templates (#13883)
• raise DeprecationWarning for a targetless timeline drawer (#13601)
• Deprecate atomic_evolution (#13603)
• Deprecation of MCMT in favor of MCMTGate (backport #13584) (#13810)
• Deprecate subclassing of Register and Bit (#13841)
• Deprecate BackendV2Converter (#12840)
• Deprecate BasicSimulator.run_experiment (#13750)
• Deprecate DAGNode.sort_key attribute (#13744)
• Deprecate show_idle and show_barrier in favor of idle_wires and plot_barriers (#13602)

Added

• Add method to compute estimated duration of scheduled circuit (backport #13783) (#13881)

Changed

• Warn on use of property_set kwarg to BasePassManger.run (#13821)

Fixed

• Applying a slight perturbation for ill-conditioned matrices (#13882)
• Fix incorrect stop time bug #8729 (#11097) (#13843)
• Fix tracking of routing permutation in Sabre with disjoint backends (#13833) (#13835)
• Consider unit in Delay comparisons (#13816) (#13827)
• Correctly updating global phase when removing gates that are identity up to a global phase (backport #13785) (#13825)
• Fix CommutationChecker for 2q Pauli rotations (#13762) (#13804)
• Fix barrier label position when bits are reversed (#13780) (#13789)
• Fix random_clifford (#13606) (#13710)
• Fix 4-pi periodicity of controlled rotations in the CommutationChecker (#13670) (#13676)
• More conservative caching in the CommutationChecker (#13600) (#13677)
• Fix an error in qasm3 exporter when operating on unitary gates (#13633) (#13663)
• Fix PauliEvolutionGate (using product formulas) for all-identity Pauli terms (#13634) (#13658)
• Fix UnitarySynthesis pass bug when target contains global gates (#13651) (#13656)
• Fix Target.instruction_supported when target.num_qubits == None (#13655) (#13657)
• fix the 0 complex part (#13643) (#13646)
• Fix phase of pauli_list.insert(..., qubit=True) for length-1 pauli_list (#13624) (#13637)
• Fix UnitarySynthesis for 3+ qubits when compiled for a backend (#13591) (#13619)
• Only apply MCMT plugin on MCMTGate (#13596) (#13618)
• Fix SparsePauliOp initialization with dense Y labels (#13580) (#13611)
• Fix behavior of n_local calling circuits for num_qubits=1 (#13523) (#13575)
• Check for gate parameter (#12439)
• Discard cache for standard gates in assign_parameters (#13557) (#13559)
• Fix .decompose on control flow (#13545) (#13549)
• Fix registering global_phase parameters when creating CircuitData (#13538) (#13541)
• Do not unroll gates in basis in add_control (#13475) (#13528)

Changelog

Fixed

• Applying a slight perturbation for ill-conditioned matrices (#13882)
• Fix incorrect stop time bug #8729 (#11097) (#13843)
• Fix tracking of routing permutation in Sabre with disjoint backends (#13833) (#13835)
• Consider unit in Delay comparisons (#13816) (#13827)
• Correctly updating global phase when removing gates that are identity up to a global phase (backport #13785) (#13825)
• Fix CommutationChecker for 2q Pauli rotations (#13762) (#13804)
• Fix barrier label position when bits are reversed (#13780) (#13789)
• Fix random_clifford (#13606) (#13710)

Changelog

Fixed

• Fix 4-pi periodicity of controlled rotations in the CommutationChecker (#13670) (#13676)
• More conservative caching in the CommutationChecker (#13600) (#13677)
• Fix an error in qasm3 exporter when operating on unitary gates (#13633) (#13663)
• Fix PauliEvolutionGate (using product formulas) for all-identity Pauli terms (#13634) (#13658)
• Fix UnitarySynthesis pass bug when target contains global gates (#13651) (#13656)
• Fix Target.instruction_supported when target.num_qubits == None (#13655) (#13657)
• fix the 0 complex part (#13643) (#13646)
• Fix phase of pauli_list.insert(..., qubit=True) for length-1 pauli_list (#13624) (#13637)
• Fix UnitarySynthesis for 3+ qubits when compiled for a backend (#13591) (#13619)
• Only apply MCMT plugin on MCMTGate (#13596) (#13618)
• Fix SparsePauliOp initialization with dense Y labels (#13580) (#13611)
• Fix behavior of n_local calling circuits for num_qubits=1 (#13523) (#13575)

Changelog

Fixed

• Discard cache for standard gates in assign_parameters (#13557) (#13559)
• Fix .decompose on control flow (#13545) (#13549)
• Fix registering global_phase parameters when creating CircuitData (#13538) (#13541)
• Do not unroll gates in basis in add_control (#13475) (#13528)

Release notes: https://docs.quantum.ibm.com/api/qiskit/release-notes/1.3

Changelog

Deprecated

• Deprecate loose custom basis gates in preset pm pipieline (#13394)
• Add missing pulse-related deprecation (#13392)
• Deprecate the condition attribute and related functionality (#13223)
• Deprecate qiskit.result.mitigation (#13351)
• Deprecate BasicSimulator.configuration (#13367)
• Deprecate instruction_durations, timing_constraints and backend_properties (#13338)
• Add EchoRZXWeylDecomposition to Pulse deprecation (#13366)
• Deprecate Pulse package and dependencies (#13164)
• Improve deprecation of unit and duration (#13247)
• Deprecate the unit and duration attributes (#13224)
• deprecate BackendV1 in PassManagerConfig.from_backend (#12931)
• Deprecates StochasticSwap and suggests the use of SabreSwap (#12983)
• Deprecate BackendV1 and qiskit.providers.models (backport #12629) (#12864)
• Deprecate BackendV1 and qiskit.providers.models (#12629)
• Deprecate fake backends based on BackendV1 (backport #12660) (#12837)
• Deprecate fake backends based on BackendV1 (#12660)
• fixes #9355 deprecate visualize_transition (#12287) (#12822)
• fixes #9355 deprecate visualize_transition (#12287)

Added

• Reorder Pauli terms before Trotterization (#12925)
• Evolved operator functions (#13361)
• Add Rustiq-based synthesis for PauliEvolutionGate (#13301)
• Oxidize NLocal & family (#13310)
• Add pauli_twirl_2q_gates function (#13331)
• Add identity removal pass to presets (#13363)
• Binary arithmetic gates (#13354)
• Add Qiskit native QPY ParameterExpression serialization (#13356)
• Oxidize the ConsolidateBlocks pass (#13368)
• Add more default trials to sabre layout (#13360)
• Add grover_operator function (#13365)
• Add iterator-access methods to SparseObservable (#13370)
• Add meas_level, meas_return, and noise_model options to BackendSamplerV2 (#13357)
• Prepare PauliEvolutionGate for Rustiq & port it to Rust (#13295)
• More quantum circuit library refactoring (#13353)
• Optimise SparsePauliOp.from_operator (#11557)
• Boolean circuits as gates (#13333)
• Improve qubit tracking in HighLevelSynthesis (#13240)
• Parameterize Commutation Checker (#13302)
• IQP as circuit library function (and in Rust) (#13241)
• Implement SparseObservable.apply_layout (#13372)
• Improve speed of Pauli.to_label (#13379)
• Implement arithmetic on SparseObservable (#13298)
• Add RemoveIdentityEquivalent transpiler pass (#12384)
• Add official support for Python 3.13 (#13309)
• Add base representation of SparseObservable (#12671)
• Use Rust generator function for QuantumVolume class (#13283)
• Implement __eq__ for remaining standard-library gates except mcx (#13327)
• Fix QuantumCircuit.decompose for high-level objects (#13311)
• Improve deprecation of unit and duration (#13247)
• MCMTGate & plugins (#13150)
• Port ElidePermutations transpiler pass to Rust (#13094)
• Add Rust quantum volume function (#13238)
• Add some more gates to CollectCliffords pass (#13214)
• Make qasm3.CustomGate accessible from Python space (#13187)
• Oxidize PauliFeatureMap (#13045)
• Add equivalence-library rules between rzz and cp (#13019)
• Port RemoveDiagonalGatesBeforeMeasure to rust (#13065)
• Oxidize Commutation Analysis (#12995)
• Oxidize commutation checker (#12870)
• Oxidize random clifford (#12695)
• Fixed ZZFeatureMap not accepting a list of entanglement (#12767)
• Port the count_ops method in QuantumCircuit to Rust (#13050)
• Fully port Optimize1qGatesDecomposition to Rust (#12959)
• Promote CONTROL_FLOW_OP_NAMES to public API (#13057)
• [DAGCircuit Oxidation] Port DAGCircuit to Rust (#12550)
• Adding MCX synthesis plugins (#12961)
• Port synth_cz_depth_line_mr to Rust (#12949)
• Auxiliary qubit tracking in HighLevelSynthesis (#12911)
• Move mcx synthesis methods with ancillas to the synthesis library (#12904)
• 'Peephole' optimization - or: collecting and optimizing two-qubit blocks - before routing (#12727) (#12881)
• 'Peephole' optimization - or: collecting and optimizing two-qubit blocks - before routing (#12727)
• Avoid operator creation in transpiler (#12826) (#12875)
• Avoid operator creation in transpiler (#12826)
• Port star_preroute to rust (backport #12761) (#12846)
• Add config option to leverage all cores for sabre (#12780) (#12841)
• Port star_preroute to rust (#12761)
• Add config option to leverage all cores for sabre (#12780)
• Bitarray postselect (#12693) (#12836)
• Bitarray postselect (#12693)
• Add AnnotatedOperation.params and fix some control issues (#12752) (#12828)
• Add a default optimization level to generate_preset_pass_manager (#12150)
• Add AnnotatedOperation.params and fix some control issues (#12752)

Changed

• Add Qiskit native QPY ParameterExpression serialization (#13356)
• Use Rust generator function for QuantumVolume class (#13283)
• Raise minimum python version to 3.9 (#12910)
• [DAGCircuit Oxidation] Port DAGCircuit to Rust (#12550)
• Update metadata of Primitives V2 (#12784) (#12857)
• Update metadata of Primitives V2 (#12784)
• Change the default routing_method to sabre (#12806) (#12847)
• Change the default routing_method to sabre (#12806)

Fixed

• Fix InverseCancellation to run in classical blocks (#13454) (#13496)
• Fix parameter handling for NLocal(..., flatten=True) and standard gates (#13482) (#13495)
• HLS fix to not synthesize instructions already supported (#13417) (#13441)
• Fix process-based non-determinism in SparsePauliOp.to_matrix (#13439) (#13440)
• Fix the calculation for identity operator's expectation value (#13345) (#13436)
• Add argument assume_unitary to Operator.power. (#13319)
• Fix performance regression in looped QuantumCircuit.assign_parameters (#13337)
• Fix type of basis_gates in BasicSimulator configuration (#13385)
• Fix compatibility issues with SciPy 1.14 (#13358)
• Fix OpenQASM 2 gate definitions following a shadowed built-in gate (#13340)
• Fix QuantumCircuit.decompose for high-level objects (#13311)
• Fix bug in QPY symengine payload version handling (#13259)
• Workaround symengine serialization payload incompatibility (#13251)
• Don't run ElidePermutation if routing is disabled (#13184)
• Bug fix in ElidePermutations (#13186)
• Make dense layout algorithm deterministic when run in parallel (#13133)
• Fix qft-plugins for custom 'qft' gates (#13181)
• Re-allow non-standard includes in OpenQASM 3 exporter (#13148)
• improved fast-path detection in HLS (#13070)
• Fix an edge case in Sabre's release valve (#13114)
• Fix the matrix representation of CUGate in Rust (#13121)
• Fix creation of registers in synthesis methods (#13086)
• Restrict Split2QUnitaries to run on UnitaryGate (#13095)
• Bug fix in HoareOptimizer (#13083)
• Fix extraction of controlled parametric gates (#13067)
• Fixed ZZFeatureMap not accepting a list of entanglement (#12767)
• Fix use of node.op in Split2QUnitaries (#13015)
• Fix UnitaryGate.repeat() method (#12986)
• Move the circuit library's entanglement logic to Rust (#12950)
• [DAGCircuit Oxidation] Port DAGCircuit to Rust (#12550)
• Fix Rust-space TwoQubitBasisDecomposer for non-standard KAK gate (#13014)
• Extended the from_backend method of InstructionDurations to support both BackendV1 and BackendV2 (#12941)
• Fix Initialize.gates_to_uncompute method (#12976)
• Parsing of seed_transpiler in generate_preset_pass_manager (#12980)
• fix stateprep's normalize (#12988)
• adding copy argument to array (#12979)
• Fix setter so that SparsePauliOp.paulis.phase stays zero (#12884)
• Fix error message upon misalignment in PadDynamicalDecoupling (#12952) (#12954)
• Fix error message upon misalignment in PadDynamicalDecoupling (#12952)
• Improve error message on bad OpenQASM 3 basis_gates argument (#12945) (#12946)
• Improve error message on bad OpenQASM 3 basis_gates argument (#12945)
• Expose seed in Estimator and StatevectorEstimator (#12862)
• Fix dag visualization with Var wires (#12848) (#12924)
• Remove init peephole optimization discrete basis check (#12898) (#12920)
• Fix dag visualization with Var wires (#12848)
• Remove init peephole optimization discrete basis check (#12898)
• Fix parsing of huge OpenQASM 2 conditionals (#12774) (#12854)
• Fix StatevectorSampler to raise an error if a circuit with c_if is passed (#12842) (#12851)
• Fix parsing of huge OpenQASM 2 conditionals (#12774)
• Fix StatevectorSampler to raise an error if a circuit with c_if is passed (#12842)
• Make BitArray.{slice_bits,slice_shots,__getitem__} raise IndexError when indices are not valid (#12755) (#12845)
• Make BitArray.{slice_bits,slice_shots,__getitem__} raise IndexError when indices are not valid (#12755)
• Add AnnotatedOperation.params and fix some control issues (#12752) (#12828)
• Add AnnotatedOperation.params and fix some control issues (#12752)
• Fix BitArray.from_counts/from_samples to not fail for input with only 0 outcome and num_bits=None (#12800) (#12820)
• Fix BitArray.from_counts/from_samples to not fail for input with only 0 outcome and num_bits=None (#12800)