Qiskit Terra 0.22.4

Changelog

Fixed

• Performance improvement of _DiagonalEstimator (#9229) (#9243)
• Fix the aggregation argument of SamplingVQE (#9221) (#9241)
• Fix ComposedOp.to_matrix (#9316) (#9356)
• Fix a transpile issue of BackendSampler (#9236) (#9249)
• Fix Sampler fails on gates with unhashable parameters #9102 (#9103) (#9149)
• Fix ordering of dims in QuantumState.probabilities_dict (#9214) (#9226)

Qiskit Terra 0.22.3

Release notes: https://qiskit.org/documentation/release_notes.html#terra-0-22-3

Changelog

Fixed

• Infer cregbundle for all drawers (#9133) (#9191)
• fix: QNSPSA with max_evals_grouped exceeding 1 (#9182) (#9189)
• fix: overwrite AdaptVQE.supports_aux_operators (#9142) (#9166)
• Fix serialization of primitives (#9076) (#9152)
• Reinstate pulse.Instruction.draw (#9144) (#9147)
• Fix random seed initialization between runs in SabreSwap (backport #9127) (#9132)
• 🐛 fix deprecated Loader.load_module() (#9078) (#9114)

Qiskit Terra 0.22.2

Release notes: https://qiskit.org/documentation/release_notes.html#terra-0-22-2

Changelog

Added

• Add support for Python 3.11 (backport #9028) (#9071)

Fixed

• Fix Backend primitive classes for BackendV1 with no max_experiments (#9069) (#9072)
• Avoid deepcopy in pulse parser (#9063) (#9068)
• Fix incorrect graph construction in VF2PostLayout (#9058) (#9060)

Qiskit Terra 0.22.1

Full release notes: https://qiskit.org/documentation/release_notes.html#terra-0-22-1

Changelog

Fixed

• Fix default batching in variational algorithms (#9038) (#9050)
• Fix handling of global ideal gates for target build_coupling_map() (#8977) (#9040)
• Fix backend primitives on backends with job size limit (#8955) (#9039)
• Fix zero-operand gates and instructions (#8272) (#9034)
• Fix transpile() with a Target containing an ideal Measure (#8995) (#9020)
• Fix VQD for k>2 (#8989) (#9009)
• Fix manifest entry for mpl styles (#9004) (#9007)
• fix #8992 (#8998) (#9000)
• Fix VF2Layout and VF2PostLayout handling of instructions without error (#8978) (#8997)
• Cast ParameterExpression to float in RZXBuilder and RZXCalibrationBuilderNoEcho (#8965) (#8994)
• Fix parallel dispatch with target argument in transpile() (#8952) (#8972)
• Fix Statevector.evolve and DensityMatrix.evolve for mixed dimension subsystems (#8900) (#8964)
• Fix classical-bit handling in control-flow StochasticSwap (#8906) (#8956)
• fix hinton visualization bug (#8447) (#8946)
• Fix single-bit-condition equality in QuantumCircuit and DAGCircuit (#8930) (#8943)
• Fix qpy custom ControlledGate with overloaded _define() (#8927) (#8937)
• Fix BarrierBeforeFinalMeasurements with loose bits (#8924) (#8939)
• Fix handling of globally defined operations in Target (#8925) (#8938)
• Fix loose-bit handling in QPY (#8928) (#8931)
• Fix pauli_basis deprecation (#8905) (#8909)

Qiskit Terra 0.22.0

Release notes: https://qiskit.org/documentation/release_notes.html#qiskit-0-39-0

Changelog

Deprecated

• Switch to primitive support in QNSPSA (#8682)
• Pending deprecate algo eigen_solvers (#8651)
• Clifford does not use StabilizerTable as internal data and PendingDeprecation of PauliTable and StabilizerTable (#7269)
• Pending deprecate algorithms (#8703)
• Rewrite Amplitude Estimators with Primitives (#8656)
• Quantum Phase Estimation algorithms with primitives. (#8666)
• Support Sampler in Grover (#8647)
• Prepare for removal of tweedledum as a requirement (#8738)
• Adds observable evaluator with primitives. (#8683)
• Time Evolution Framework with primitives. (#8681)
• deprecate qiskit.pulse.utils.deprecated_functionality in favor of qiskit.utils.deprecation.deprecate_function (#8696)
• Deprecate Algorithms Factorizers and Linear Solvers (#8617)
• Add run method to primitives (#8382)

Added

• Modify preset pass managers for control-flow support (#8830)
• Add controlflow handling to stochastic swap pass (#8418)
• Add support for custom backend transpiler stages (#8648)
• Update GateDirection and checker for control flow (#8822)
• Add control-flow support to GatesInBasis (#8823)
• plot_histogram now a valid histogram, plot_distribution for non-discrete data (#8762)
• Sampled expectation value for distributions (#8748)
• Implementing pluggable HighLevelSynthesis (#8548)
• Handle control-flow in DenseLayout (#8742)
• Switch to primitive support in QNSPSA (#8682)
• add controlflow handling to CheckMap transpiler pass. (#8793)
• Add BackendSampler for Sampler from an arbitrary backend (#8668)
• Add backend estimator for estimator from an arbitrary backend (#8736)
• Sampler-based VQE for diagonal operators, plus QAOA (#8669)
• Make VF2Layout and VF2PostLayout work with control flow (#8804)
• Add control-flow support to "properties" transpiler passes (#8763)
• Implement eigensolvers (VQD) with primitives (#8640)
• Clifford does not use StabilizerTable as internal data and PendingDeprecation of PauliTable and StabilizerTable (#7269)
• add control flow support to UnitarySynthesis pass (#8565)
• Add conversion transpiler pass from c_if to IfElseOp (#8764)
• Parameter handling in SparsePauliOp (#8620)
• Migrating AdaptVQE to Qiskit Terra (#7930)
• Add BackendV2Converter class for treating BackendV1 as BackendV2 (#8759)
• Add optimization to quantum shannon decomposition (#8092)
• VQE implementation with estimator primitive (#8702)
• Remove symbolic pulse subclass implementation (#8278)
• Improving memory consumption of DagDependency when lists of transitive predecessors and successors are not required (#8525)
• Rewrite Amplitude Estimators with Primitives (#8656)
• Quantum Phase Estimation algorithms with primitives. (#8666)
• Implemented TrotterQRTE algorithm with primitives. (#8706)
• Support Sampler in Grover (#8647)
• Implemented PVQD algorithm with primitives. (#8705)
• adding FakeGeneva (#8322)
• Add FakeAuckland backend to fake provider (#8467)
• Add FakeOslo backend to fake provider (#8358)
• adding FakePerth (#8344)
• Allow DAG-node substitution without overriding conditions (#8615)
• Adds observable evaluator with primitives. (#8683)
• Edge coloring for the Commuting2qGateRouter (#8341)
• Pulse reference mechanism (#8005)
• Add BaseResult functionality to primitives module (#8091)
• Time Evolution Framework with primitives. (#8681)
• Add CS, CSdg and CCZ gates to the CNOTDihedral class (#8673)
• feat: support sum(LinearMixin) (#8722)
• Default run_options for Primitives (#8513)
• Gradients with the primitives (#8528)
• Fidelity interface using primitives (#8303)
• Add curve fill control option to pulse drawer (#8658)
• Add ResetAfterMeasureSimplification transpiler pass (#8330)
• Enable multiple parallel seed trials for SabreSwap (#8572)
• Implements two-step tapering (#8590)
• Add stage plugin interface for transpile (#8305)
• Steppable Optimizer (#8170)
• Add CS and CCZ gates (#8583)
• Variational Quantum Time Evolution algorithm. (#8152)
• Add barrier labels and display in 3 circuit drawers (#8440)
• Adding Cliffords to QuantumCircuits as Operations (#7966)
• Improve the performance of taper in opflow (#8410)
• Refactoring commutativity analysis and a new commutative inverse cancellation transpiler pass (#8184)
• Add run method to primitives (#8382)
• Projected Variational Quantum Dynamics (#8304)
• Add optimization for TwoLocal synthesis when entanglement='full' (#8335)
• Reimplement SabreSwap heuristic scoring in Rust (#7977)
• Tensored fitter (#8345)
• Add wire_order option to all circuit drawers to allow defining the order of the wires (#8173)
• Added argsort and sort method to SparsePauliOp (#8016)
• add atol parameter to SparsePauliOp.equiv (#8281)
• Combine circuits with clbits onto those with none (#7823)
• Add shots option to primitives (#8137)

Changed

• Fix transpile() for control flow operations with a Target/BackendV2 (#8852) (#8889)
• Remove tweedledum from macOS arm64 immediately (#8849)
• Fix reverse permutation for transpiled circuits in Operator.from_circuit (#8802)
• Remove pulse defaults for old fake 20q backends (#8665)
• Use Sabre by default for optimization levels 1 and 2 (#8552)
• Remove symbolic pulse subclass implementation (#8278)
• Quantum Phase Estimation algorithms with primitives. (#8666)
• Support Sampler in Grover (#8647)
• Update ProbDistribution and QuasiDistribution to store the number of bits if bitstrings w/o prefix are given (#8464)
• Fix handling of holes in physical bits list in Layout (#8767)
• Default set to turn off approximation_degree (#8595)
• Prepare for removal of tweedledum as a requirement (#8738)
• Pulse reference mechanism (#8005)
• Move circuit drawer files to qiskit.visualization.circuit (#8306)
• Reimplement SabreSwap heuristic scoring in Rust (#7977)

Removed

• Remove deprecated pulse-builder contexts (#8697)
• Remove deprecated methods and arguments in quantum_info (#8510)
• Fix maxfun default in L_BFGS (#8285)
• Argument epsilon and factr of optimizers L_BFGS_B and factr of P_BFGS has been removed (#8210)
• Deprecated QiskitIndexError removed (#8209)

Fixed

• Fix transpile() for control flow operations with a Target/BackendV2 (#8852) (#8889)
• Fix pauli.evolve dtype casting error (#8877) (#8884)
• Modify preset pass managers for control-flow support (#8830)
• Fix handling of 1q gates in UnitarySynthesis with target (#8847)
• Fix DenseLayout when loose bits are present in input circuit (#8843)
• Fix reverse permutation for transpiled circuits in Operator.from_circuit (#8802)
• Introduce observable key for Estimator (#8837)
• Resolve classical conditions in QuantumCircuit.while_loop (#8833)
• Update GateDirection and checker for control flow (#8822)
• "cregbundle set to False" warning should not raised when no classical bits are involved (#8689)
• Add control-flow support to "properties" transpiler passes (#8763)
• Fix for None in state_to_latex latex output (#8273)
• Fix flipping of gate direction in transpiler for CZ gate (#8625)
• add state_to_latex prefix kwarg (#8461)
• Fix handling of holes in physical bits list in Layout (#8767)
• Fix printing an empty PauliList (#7712)
• Add internal routine for canonicalisation of control-flow builders (#8627)
• Composite key for Primitives (#8604)
• Raise error for missing bounds in optimizer SNOBFIT (#8638)
• Fix OpenQASM 3 built-ins with classical conditions (#8731)
• Clean up text drawer compression issues (#8588)
• Use np.array_split instead of np.split to support uneven splits in spsa._batch_evaluate (#8634)
• Fix LaTeX drawer on split-filesystem systems (#8629)
• Fix decomposition for a single qubit and clbit (#8614)
• Fix VQD callback not being used (#8576)
• Add logic to return channels to FakeBackendV2 (#8444)
• Fix QuantumCircuit.compose within control-flow scopes (#8570)
• Fix QPY serialisation of ControlledGate with open controls (#8571)
• accept single qubit in initialize to fix #8408 (#8463)
• Fix global phase in inverse of UCGate (#8508)
• Changing aer_simulator_statevector checking method (#8411)
• Fix ParameterExpression.is_real if symengine is installed (#8456)
• Fix MPL and LaTeX circuit drawer when idle_wires=False and there are barriers (#8321)
• Fix converting VectorStateFn to a CircuitStateFn (#8405)
• Fix handling of numpy arrays for indices in marginal_distribution (#8288)
• Fix EvolvedOp.to_instruction (#8384)
• Fix Optimizer reconstruction from settings (#8381)
• Fix Uc gate global phase (#8231)
• Fix bug in circuit decompose (#8364)
• Fix pairwise entanglement (#8346)
• Switched to StandardScaler from deprecated normalize in NaturalGradient (#8299)
• fix limit_amplitude bug (#8308)
• Fix UnitaryGate.qasm() with unused qubits (#8234) (#8243)
• Fix UnitaryGate.qasm() with unused qubits (#8234)

Qiskit Terra 0.22.0rc1

Changelog

Deprecated

• Switch to primitive support in QNSPSA (#8682)
• Pending deprecate algo eigen_solvers (#8651)
• Clifford does not use StabilizerTable as internal data and PendingDeprecation of PauliTable and StabilizerTable (#7269)
• Pending deprecate algorithms (#8703)
• Rewrite Amplitude Estimators with Primitives (#8656)
• Quantum Phase Estimation algorithms with primitives. (#8666)
• Support Sampler in Grover (#8647)
• Prepare for removal of tweedledum as a requirement (#8738)
• Adds observable evaluator with primitives. (#8683)
• Time Evolution Framework with primitives. (#8681)
• deprecate qiskit.pulse.utils.deprecated_functionality in favor of qiskit.utils.deprecation.deprecate_function (#8696)
• Deprecate Algorithms Factorizers and Linear Solvers (#8617)
• Add run method to primitives (#8382)

Added

• Modify preset pass managers for control-flow support (#8830)
• Add controlflow handling to stochastic swap pass (#8418)
• Add support for custom backend transpiler stages (#8648)
• Update GateDirection and checker for control flow (#8822)
• Add control-flow support to GatesInBasis (#8823)
• plot_histogram now a valid histogram, plot_distribution for non-discrete data (#8762)
• Sampled expectation value for distributions (#8748)
• Implementing pluggable HighLevelSynthesis (#8548)
• Handle control-flow in DenseLayout (#8742)
• Switch to primitive support in QNSPSA (#8682)
• add controlflow handling to CheckMap transpiler pass. (#8793)
• Add BackendSampler for Sampler from an arbitrary backend (#8668)
• Add backend estimator for estimator from an arbitrary backend (#8736)
• Sampler-based VQE for diagonal operators, plus QAOA (#8669)
• Make VF2Layout and VF2PostLayout work with control flow (#8804)
• Add control-flow support to "properties" transpiler passes (#8763)
• Implement eigensolvers (VQD) with primitives (#8640)
• Clifford does not use StabilizerTable as internal data and PendingDeprecation of PauliTable and StabilizerTable (#7269)
• add control flow support to UnitarySynthesis pass (#8565)
• Add conversion transpiler pass from c_if to IfElseOp (#8764)
• Parameter handling in SparsePauliOp (#8620)
• Migrating AdaptVQE to Qiskit Terra (#7930)
• Add BackendV2Converter class for treating BackendV1 as BackendV2 (#8759)
• Add optimization to quantum shannon decomposition (#8092)
• VQE implementation with estimator primitive (#8702)
• Remove symbolic pulse subclass implementation (#8278)
• Improving memory consumption of DagDependency when lists of transitive predecessors and successors are not required (#8525)
• Rewrite Amplitude Estimators with Primitives (#8656)
• Quantum Phase Estimation algorithms with primitives. (#8666)
• Implemented TrotterQRTE algorithm with primitives. (#8706)
• Support Sampler in Grover (#8647)
• Implemented PVQD algorithm with primitives. (#8705)
• adding FakeGeneva (#8322)
• Add FakeAuckland backend to fake provider (#8467)
• Add FakeOslo backend to fake provider (#8358)
• adding FakePerth (#8344)
• Allow DAG-node substitution without overriding conditions (#8615)
• Adds observable evaluator with primitives. (#8683)
• Edge coloring for the Commuting2qGateRouter (#8341)
• Pulse reference mechanism (#8005)
• Add BaseResult functionality to primitives module (#8091)
• Time Evolution Framework with primitives. (#8681)
• Add CS, CSdg and CCZ gates to the CNOTDihedral class (#8673)
• feat: support sum(LinearMixin) (#8722)
• Default run_options for Primitives (#8513)
• Gradients with the primitives (#8528)
• Fidelity interface using primitives (#8303)
• Add curve fill control option to pulse drawer (#8658)
• Add ResetAfterMeasureSimplification transpiler pass (#8330)
• Enable multiple parallel seed trials for SabreSwap (#8572)
• Implements two-step tapering (#8590)
• Add stage plugin interface for transpile (#8305)
• Steppable Optimizer (#8170)
• Add CS and CCZ gates (#8583)
• Variational Quantum Time Evolution algorithm. (#8152)
• Add barrier labels and display in 3 circuit drawers (#8440)
• Adding Cliffords to QuantumCircuits as Operations (#7966)
• Improve the performance of taper in opflow (#8410)
• Refactoring commutativity analysis and a new commutative inverse cancellation transpiler pass (#8184)
• Add run method to primitives (#8382)
• Projected Variational Quantum Dynamics (#8304)
• Add optimization for TwoLocal synthesis when entanglement='full' (#8335)
• Reimplement SabreSwap heuristic scoring in Rust (#7977)
• Tensored fitter (#8345)
• Add wire_order option to all circuit drawers to allow defining the order of the wires (#8173)
• Added argsort and sort method to SparsePauliOp (#8016)
• add atol parameter to SparsePauliOp.equiv (#8281)
• Combine circuits with clbits onto those with none (#7823)
• Add shots option to primitives (#8137)

Changed

• Remove tweedledum from macOS arm64 immediately (#8849)
• Fix reverse permutation for transpiled circuits in Operator.from_circuit (#8802)
• Remove pulse defaults for old fake 20q backends (#8665)
• Use Sabre by default for optimization levels 1 and 2 (#8552)
• Remove symbolic pulse subclass implementation (#8278)
• Quantum Phase Estimation algorithms with primitives. (#8666)
• Support Sampler in Grover (#8647)
• Update ProbDistribution and QuasiDistribution to store the number of bits if bitstrings w/o prefix are given (#8464)
• Fix handling of holes in physical bits list in Layout (#8767)
• Default set to turn off approximation_degree (#8595)
• Prepare for removal of tweedledum as a requirement (#8738)
• Pulse reference mechanism (#8005)
• Move circuit drawer files to qiskit.visualization.circuit (#8306)
• Reimplement SabreSwap heuristic scoring in Rust (#7977)

Removed

• Remove deprecated pulse-builder contexts (#8697)
• Remove deprecated methods and arguments in quantum_info (#8510)
• Fix maxfun default in L_BFGS (#8285)
• Argument epsilon and factr of optimizers L_BFGS_B and factr of P_BFGS has been removed (#8210)
• Deprecated QiskitIndexError removed (#8209)

Fixed

• Modify preset pass managers for control-flow support (#8830)
• Fix handling of 1q gates in UnitarySynthesis with target (#8847)
• Fix DenseLayout when loose bits are present in input circuit (#8843)
• Fix reverse permutation for transpiled circuits in Operator.from_circuit (#8802)
• Introduce observable key for Estimator (#8837)
• Resolve classical conditions in QuantumCircuit.while_loop (#8833)
• Update GateDirection and checker for control flow (#8822)
• "cregbundle set to False" warning should not raised when no classical bits are involved (#8689)
• Add control-flow support to "properties" transpiler passes (#8763)
• Fix for None in state_to_latex latex output (#8273)
• Fix flipping of gate direction in transpiler for CZ gate (#8625)
• add state_to_latex prefix kwarg (#8461)
• Fix handling of holes in physical bits list in Layout (#8767)
• Fix printing an empty PauliList (#7712)
• Add internal routine for canonicalisation of control-flow builders (#8627)
• Composite key for Primitives (#8604)
• Raise error for missing bounds in optimizer SNOBFIT (#8638)
• Fix OpenQASM 3 built-ins with classical conditions (#8731)
• Clean up text drawer compression issues (#8588)
• Use np.array_split instead of np.split to support uneven splits in spsa._batch_evaluate (#8634)
• Fix LaTeX drawer on split-filesystem systems (#8629)
• Fix decomposition for a single qubit and clbit (#8614)
• Fix VQD callback not being used (#8576)
• Add logic to return channels to FakeBackendV2 (#8444)
• Fix QuantumCircuit.compose within control-flow scopes (#8570)
• Fix QPY serialisation of ControlledGate with open controls (#8571)
• accept single qubit in initialize to fix #8408 (#8463)
• Fix global phase in inverse of UCGate (#8508)
• Changing aer_simulator_statevector checking method (#8411)
• Fix ParameterExpression.is_real if symengine is installed (#8456)
• Fix MPL and LaTeX circuit drawer when idle_wires=False and there are barriers (#8321)
• Fix converting VectorStateFn to a CircuitStateFn (#8405)
• Fix handling of numpy arrays for indices in marginal_distribution (#8288)
• Fix EvolvedOp.to_instruction (#8384)
• Fix Optimizer reconstruction from settings (#8381)
• Fix Uc gate global phase (#8231)
• Fix bug in circuit decompose (#8364)
• Fix pairwise entanglement (#8346)
• Switched to StandardScaler from deprecated normalize in NaturalGradient (#8299)
• fix limit_amplitude bug (#8308)
• Fix UnitaryGate.qasm() with unused qubits (#8234) (#8243)
• Fix UnitaryGate.qasm() with unused qubits (#8234)

Qiskit Terra 0.21.2

Changelog

Fixed

• Add logic to return channels to FakeBackendV2 (#8444) (#8599)
• Improve the performance of taper in opflow (backport #8410) (#8514)
• Fix QuantumCircuit.compose within control-flow scopes (#8570) (#8579)
• Fix QPY serialisation of ControlledGate with open controls (#8571) (#8578)
• Fix global phase in inverse of UCGate (#8508) (#8536)
• Changing aer_simulator_statevector checking method (#8411) (#8499)
• Fix ParameterExpression.is_real if symengine is installed (#8456) (#8462)

Qiskit Terra 0.21.1

Release notes: https://qiskit.org/documentation/release_notes.html#terra-0-21-1

Changelog

Fixed

• Fix converting VectorStateFn to a CircuitStateFn (#8405) (#8409)
• Fix handling of numpy arrays for indices in marginal_distribution (#8288) (#8396)
• Fix EvolvedOp.to_instruction (#8384) (#8386)
• Fix Optimizer reconstruction from settings (#8381) (#8385)
• Fix bug in circuit decompose (#8364) (#8377)
• Fix Uc gate global phase (#8231) (#8378)
• Fix pairwise entanglement (#8346) (#8348)
• fix limit_amplitude bug (#8308) (#8309)

Qiskit Terra 0.21.0

Release notes: https://qiskit.org/documentation/release_notes.html#terra-0-21-0

Changelog

Deprecated

• Move qiskit.test.mock to qiskit.providers.fake_provider and deprecate (#8121)
• QPY schedule serialization (#7300)
• Remove deprecated optimize from Optimizer (and small other fixes) (#8123)
• Add namespace redirect hook for qiskit-aer (#5089)
• Cleanup timeline drawer with schedule analysis pass. (#7935)
• Deprecate old paths for module-availability testers (#7954)
• Remove legacy providers interface (#7886)
• Deprecate networkx converter methods for DAGCircuit (#7927)

Added

• Adding variational Quantum Deflation Algorithm for computing higher energy states (#7747)
• QPY schedule serialization (#7300)
• Add grouping by full-operator commutation relations to PauliList (#7874)
• Expand instruction_supported() to optionally check parameters (#7807)
• Add dedicated functions for memory marginalization (#8051)
• Add StagedPassManager class for pass manager with defined stages (#6403)
• Speedup constant factors in LookaheadSwap (#8068)
• Add .clear() and .copy_empty_like() functionality to QuantumCircuit. (#8134)
• decompose(reps=1) repeating decompose (#8142)
• Cleanup timeline drawer with schedule analysis pass. (#7935)
• Serializable parametric pulse (#7821)
• Add label assigned check in SparsePauliOp (#8101)
• Use ParameterReferences type for ParameterTable values (#7408)
• Parallelizing scheduling of multiple circuits via parallel_map. (#8110)
• Add Qiskit Textbook circuit drawer style (#8147)
• Add function to easily generate preset pass managers (#8125)
• Enhance Primitives' interface (#8065)
• Add a marginal_distribution function (#8026)
• Alias BaseOperator.mul to BaseOperator._multiply in quantum_info (#8007)
• Support target and basis gates in Unroll3qOrMore transpiler pass (#7997)
• Trotterization-based Quantum Real Time Evolution (#7411)
• Add VF2PostLayout pass (#7862)
• add Quantum Shannon Decomposition (#7907)
• Alias BaseOperator.matmul to BaseOperator.dot (#7919)
• Add delay handling to QASM 3 exporter (#7942)
• Add swap strategies transpiler pass (#7813)
• Add support for non-hermitian operators in AerPauliExpectation (#7857)
• Add interfaces for a general Quantum Time Evolution Framework (#7858)

Changed

• Leverage Python SharedMemory for common transpile args (#7789)
• Change data type of QuantumCircuit.data elements (#8093)
• Edit Result to always contain date, status, header (#8216)
• Fix handling of ControlledGates in QPY (#8055)
• Explicitly set MSRV for rust extension (#8196)
• Make python-constraint optional (#7733)
• Change XXPlusYYGate convention (#7949)
• Remove hard time limit from vf2 passes in preset passmanagers (#8021)
• Remove BasicAer shot limit (#7801)
• Ensuring instruction labels are strings when provided to the Instruction constructor. (#7671)

Removed

• Remove deprecated classes and methods in quantum_info (#8070)
• Remove deprecated optimize from Optimizer (and small other fixes) (#8123)
• Remove DAGNode deprecations (#7902)
• Remove legacy providers interface (#7886)

Fixed

• Fix UnitaryGate.qasm() with unused qubits (#8234) (#8243)
• Leverage Python SharedMemory for common transpile args (#7789)
• Remove deprecated optimize from Optimizer (and small other fixes) (#8123)
• Fix BackendV2 support for PassManagerConfig.from_backend() (#8109)
• Edit Result to always contain date, status, header (#8216)
• Pass max_size to Statevector LaTeX drawer (#8197)
• Fix handling of ControlledGates in QPY (#8055)
• Fix QASM 3 exporter not respecting unknown basis_gates (#8160)
• Update GaussianPulse for consistent parameter validation results whether validation occurs during or after construction. (#8151)
• Fixed error in plot_histogram when number_to_keep is smaller that the number of keys (#7481)
• fix marginal_counts (which failed on pulse backend) (issue #6430) (#8099)
• set T2 with the correct value in ConfigurableFakeBackend (#8117)
• Checks if DiagonalGate has modulus 1 (#8098)
• Improve reverse_bits to support registerless bits (#7423)
• Enable proper iteration over Statevector (#8062)
• Fix SabreSwap with classically conditioned gates (#8041)
• Fix RZX builder rescaled amplitude (#8031)
• Fix marginal_counts on memory with non-zero indices (#8047)
• Use round instead of ceil for GaussianSquare pulse duration in RZXCalibrationBuilder (#7995)
• Fix fake backend v2 dtm unit (#8019)
• Remove hard time limit from vf2 passes in preset passmanagers (#8021)
• Add missing delay instruction to fake backends (#8003)
• Fix instruction durations in transpile() with BackendV2 (#8001)
• Fix dt units in test util function convert_to_target (#8000)
• Fix order of input and gate declarations in QASM 3 exporter (#7972)
• Fix potential infinite loop in SabreSwap (#7970)
• Make SabreSwap account for clbits in predecessors (#7952)
• Fix QPY deserialization of UCRX, UCRY, and UCRZ gates (#7933)
• Fix dag visualization for DAGCircuits without registers (#7923)
• Allow shots to be a numpy.int64 (#7824)
• Bug fix for DRAG pulse beta validation (#7925)
• Fix init_observable for Pauli (#7898)
• Fix return type from schedule() with a list of one entry (#7885)
• Fix plot_error_map with BackendProperties set or BackendV2 (#7880)
• Fix of eval_observables() when quantum_circuit is a StateFn. (#7863)
• Fix hard-coded sleep in run_circuits (#7793)
• Fixes Clifford, Pauli, CNOTDihedral to handle Delay (#7850)

Qiskit Terra 0.21.0rc1

Changelog

Deprecated

• Move qiskit.test.mock to qiskit.providers.fake_provider and deprecate (#8121)
• QPY schedule serialization (#7300)
• Remove deprecated optimize from Optimizer (and small other fixes) (#8123)
• Add namespace redirect hook for qiskit-aer (#5089)
• Cleanup timeline drawer with schedule analysis pass. (#7935)
• Deprecate old paths for module-availability testers (#7954)
• Remove legacy providers interface (#7886)
• Deprecate networkx converter methods for DAGCircuit (#7927)

Added

• Adding variational Quantum Deflation Algorithm for computing higher energy states (#7747)
• QPY schedule serialization (#7300)
• Add grouping by full-operator commutation relations to PauliList (#7874)
• Expand instruction_supported() to optionally check parameters (#7807)
• Add dedicated functions for memory marginalization (#8051)
• Add StagedPassManager class for pass manager with defined stages (#6403)
• Speedup constant factors in LookaheadSwap (#8068)
• Add .clear() and .copy_empty_like() functionality to QuantumCircuit. (#8134)
• decompose(reps=1) repeating decompose (#8142)
• Cleanup timeline drawer with schedule analysis pass. (#7935)
• Serializable parametric pulse (#7821)
• Add label assigned check in SparsePauliOp (#8101)
• Use ParameterReferences type for ParameterTable values (#7408)
• Parallelizing scheduling of multiple circuits via parallel_map. (#8110)
• Add Qiskit Textbook circuit drawer style (#8147)
• Add function to easily generate preset pass managers (#8125)
• Enhance Primitives' interface (#8065)
• Add a marginal_distribution function (#8026)
• Alias BaseOperator.mul to BaseOperator._multiply in quantum_info (#8007)
• Support target and basis gates in Unroll3qOrMore transpiler pass (#7997)
• Trotterization-based Quantum Real Time Evolution (#7411)
• Add VF2PostLayout pass (#7862)
• add Quantum Shannon Decomposition (#7907)
• Alias BaseOperator.matmul to BaseOperator.dot (#7919)
• Add delay handling to QASM 3 exporter (#7942)
• Add swap strategies transpiler pass (#7813)
• Add support for non-hermitian operators in AerPauliExpectation (#7857)
• Add interfaces for a general Quantum Time Evolution Framework (#7858)

Changed

• Leverage Python SharedMemory for common transpile args (#7789)
• Change data type of QuantumCircuit.data elements (#8093)
• Edit Result to always contain date, status, header (#8216)
• Fix handling of ControlledGates in QPY (#8055)
• Explicitly set MSRV for rust extension (#8196)
• Make python-constraint optional (#7733)
• Change XXPlusYYGate convention (#7949)
• Remove hard time limit from vf2 passes in preset passmanagers (#8021)
• Remove BasicAer shot limit (#7801)
• Ensuring instruction labels are strings when provided to the Instruction constructor. (#7671)

Removed

• Remove deprecated classes and methods in quantum_info (#8070)
• Remove deprecated optimize from Optimizer (and small other fixes) (#8123)
• Remove DAGNode deprecations (#7902)
• Remove legacy providers interface (#7886)

Fixed

• Leverage Python SharedMemory for common transpile args (#7789)
• Remove deprecated optimize from Optimizer (and small other fixes) (#8123)
• Fix BackendV2 support for PassManagerConfig.from_backend() (#8109)
• Edit Result to always contain date, status, header (#8216)
• Pass max_size to Statevector LaTeX drawer (#8197)
• Fix handling of ControlledGates in QPY (#8055)
• Fix QASM 3 exporter not respecting unknown basis_gates (#8160)
• Update GaussianPulse for consistent parameter validation results whether validation occurs during or after construction. (#8151)
• Fixed error in plot_histogram when number_to_keep is smaller that the number of keys (#7481)
• fix marginal_counts (which failed on pulse backend) (issue #6430) (#8099)
• set T2 with the correct value in ConfigurableFakeBackend (#8117)
• Checks if DiagonalGate has modulus 1 (#8098)
• Improve reverse_bits to support registerless bits (#7423)
• Enable proper iteration over Statevector (#8062)
• Fix SabreSwap with classically conditioned gates (#8041)
• Fix RZX builder rescaled amplitude (#8031)
• Fix marginal_counts on memory with non-zero indices (#8047)
• Use round instead of ceil for GaussianSquare pulse duration in RZXCalibrationBuilder (#7995)
• Fix fake backend v2 dtm unit (#8019)
• Remove hard time limit from vf2 passes in preset passmanagers (#8021)
• Add missing delay instruction to fake backends (#8003)
• Fix instruction durations in transpile() with BackendV2 (#8001)
• Fix dt units in test util function convert_to_target (#8000)
• Fix order of input and gate declarations in QASM 3 exporter (#7972)
• Fix potential infinite loop in SabreSwap (#7970)
• Make SabreSwap account for clbits in predecessors (#7952)
• Fix QPY deserialization of UCRX, UCRY, and UCRZ gates (#7933)
• Fix dag visualization for DAGCircuits without registers (#7923)
• Allow shots to be a numpy.int64 (#7824)
• Bug fix for DRAG pulse beta validation (#7925)
• Fix init_observable for Pauli (#7898)
• Fix return type from schedule() with a list of one entry (#7885)
• Fix plot_error_map with BackendProperties set or BackendV2 (#7880)
• Fix of eval_observables() when quantum_circuit is a StateFn. (#7863)
• Fix hard-coded sleep in run_circuits (#7793)
• Fixes Clifford, Pauli, CNOTDihedral to handle Delay (#7850)