Qiskit Terra 0.18.2

Changelog

Fixed

• Correctly handle parametric pulse assemble() kwarg if empty list (#6922) (#6925)
• Fix mpl circuit drawing duplication in ipykernel 6 (backport #6890) (#6900)

Qiskit Terra 0.18.1

Changelog

Changed

• Exclude bip-mapper extra from all (#6843) (#6846)

Fixed

• Build aarch64 wheels in github actions with QEMU emulation (#6844) (#6854)
• Fix QNSPSA settings (#6818) (#6837)
• Handle single bit conditions in QPY (#6775) (#6835)
• Fix JupyterLab compatibility with job watcher widget (#6598) (#6834)
• Fix subgraph handling of non-contiguous nodelist argument (#6738) (#6820)
• Ensure a non-parameterized global phase in EvolvedOperatorAnsatz is a float (#6792) (#6805)
• Fix CompleteMeasFitter not imported in QuantumInstance (#6782) (#6790)
• sx and sxdg colored as cliffords in mpl (#6765) (#6773)
• Fix fake backend kwargs (#6743) (#6747)
• Change operator comparison from np.array_equal to np.allclose (#6473) (#6644) (#6739)
• update docstrings in UnitarySynthesis pass (#6737) (#6745)
• Handle complex parameters and blueprint circuits in QPY (#6713) (#6730)

Qiskit Terra 0.18.0

Changelog

Deprecated

• Deprecate the QiskitIndexError exception class (#6642)
• Deprecate legacy provider interface (#6337)
• use ParameterExpression.gradient directly (#6335)
• Add @Property and setter for DAGNode.name (#6199)
• Change attribute most_likely_phase to phase in PhaseEstimator (#6238)
• Replace DAGNode.condition with DAGNode.op.condition (#6110)

Added

• Pulse optimal decomposition of su4 for CNOT (#6581)
• Add the option to wrap circuits in QuantumCircuit.compose (#6659)
• Add dynamical decoupling transpiler pass (#6619)
• Add align measure pass (#6673)
• Add settings property to optimizer classes in qiskit.algorithms.optimizers (#6545)
• BIP mapping pass (#6580)
• Add PauliList class (#5993)
• Add support for faulty directed gate (#6407)
• Move gate, control, and param label selections from 3 circuit drawers to utils (#6078)
• Add option to sort by values to plot_histogram (#6592)
• latex-source (and latex) circuit drawer support for standalone (and cleaner output) (#6483)
• QuantumCircuit.ccx(..., ctrl_state=...) parameter added for consistency with other controlled gates (#6508)
• Add line_discipline kwarg to job_monitor function (#5691)
• Allow users to optionally specify Isometry tolerance (#6482)
• Add option to set encoding when saving Qasm to file (#5842)
• Add a new transpiler pass to remove all barriers (#6329)
• Add plain Gradient Descent optimizer (#6459)
• Arithmetic circuit library: multipliers (#6470)
• Create function to set user config (#5943)
• Add StabilizerState class to qiskit.quantum_info.states (#5907)
• Classical conditioning on individual classical bits now supported (#6018)
• Added the class RZXCalibrationBuilderNoEcho (#6300)
• Arithmetic circuit library: Adders (#6164)
• 2-SPSA and QN-SPSA (#6405)
• Add distributions results objects (#6377)
• Add SciPyOptimizer (#6319)
• Add qpy serialization format (#5578)
• Issue 6326 (#6327)
• Adding IBMQ_guadalupe as a mock backend (#6265)
• Latex drawings now show numbering of active wires in custom instructions (#6153)
• Adding Pauli and city to the draw option for statevector (#6146)

Changed

• Wrap library circuits (#6634)
• Classical condition boxes are now drawn as bullets in text drawer (#6370)
• Move Gate.label to parent Instruction class (#6626)
• Make tweedledum a hard requirement (#6588)
• Don't enable multiprocessing by default on Python 3.9 (#6524)
• Enable lo frequencies to be passed in circuits (#6167)
• Using MissingOptionalLibraryError for consistency (#6098)
• save a PDF file if circuit.draw(..., filename=.pdf) (#6446)
• Use symengine for parameter and parameter expressions (#6270)
• Update fake backend and fake provider to use versioned interface (#6286)
• Support reps=0 in the n-local circuits (#6273)
• Remove deprecation for pulse instruction parameter method (#6277)
• Update circuit.delay to accept parameterized duration (Fix #6029) (#6225)
• ScheduleBlock 4/4 - add ScheduleBlock (#6158)
• Decompose controlled Pauli rotations in terms of Paulis (#4837)

Fixed

• Fix qasm output for composite gates (#5887)
• Fix Optimize1qGatesDecomposition length heuristic (#6553)
• Add Expectation Converter to Gradient Wrapper (#6274)
• fix bug in layout deletion (#6683)
• Fixed qc.num_connected_components() for circuits with bit conditioned gates (#6564)
• Fixed issue 6623 by raising errors for negative delay durations (#6625)
• Fix calibration handling of transpiler passes on gates with >2 qubits (#6655)
• fix 6547 (#6562)
• Delay support when loading from QASM2 (#6594)
• Improve error handling in creating Pauli with an invalid label (#5911)
• Fix quantum part of Shor's algorithm (#6310)
• Fix oracle_evaluation for PhaseOracle (#6365)
• Fix #6497 (opflow.expectations ignore coefficients) (#6500)
• TwoLocal entangling map works for numpy integers (#6556)
• qc.num_connected_components() now returns the correct output (#6519)
• Fix PiecewiseChebyshev does not work as expected when breakpoints = None (#6210)
• TwoLocal raises proper exception for reps input that is not int and added unit tests (#6522)
• Fix adding controls to an open controlled gate (#6309)
• Fixed NFT optimizer by including argument for args as supplied (#6527)
• Fix result aggregation when parameterized qobj is enabled with measurement mitigation (#5494)
• Fixed typo in LinearAmplitudeFunction docstring (#6491)
• Fix 2 problems with reverse_bits on all 3 circuit drawers (#5938)
• improve error message for LookaheadSwap pass (#6452)
• Matplotlib drawer fix for drawing custom instructions with classical register (#6339)
• Fix addition of PauliSumOp with parameters (#6316)
• Correctly require is_good_state on AmplificationProblem constructor (#6417)
• Respect max_experiments in QuantumInstance BackendV1 path (#6391)
• VQE with L_BFGS_B and P_BFGS supports Gradient (#6373)
• The text drawings of custom instructions with clbits are now drawn as expected (#6242)
• Drawing boxes of custom instructions extended to classical bits in latex (#6240)
• Fix 6159 (Remove Unexpected Warning of PauliExpectation and AerPauliExpectation) (#6281)
• Typo fix of controlled SWAP gate documentation (#6358)
• fix optimal num iterations (#6298)
• BasisTranslator skips translating gates already in target basis (#6350)
• Support multiplication of TaperedPauliSumOp with ParameterExpression (#6315)
• Fix behavior of instmap.add when partial function is specified (#6292)
• Fix schedule inline transform (#6322)
• plot_histogram does not raise for neg values (#6340)
• Add support on QuantumInstance/run_circuits for Backends that don't handle QasmQobj (#6299)
• Fix #6307 (PauliExpectation takes unnecessary adjoint when it converts operators) (#6318)
• fix empty check of block subroutine (#6325)
• Fix QuantumState._subsystem_probabilities (#6324)
• Fix expval pauli qargs bug (#6304)
• Fixes disassembler error for mcx gate (#6291)
• fix error when dag_drawer removes a temporary file that is still open (#6266)
• Fix bug in Pauli.evolve for CZ, CY, Swap (#6287)
• object generation fix (#6282)
• Bug fixes for callback function in SPSA (#6253)
• fix global phase in initializer (#6236)
• Small fixes in the SparseVectorStateFn (#6272)
• BooleanExpression expression breaks label in the latex circuit drawer (#6260)
• Bugfix in clifford instruction name (#6251)
• Unroller error more descriptive when reaching a node without definition (#6235)
• Don't remove swaps with conditions in OptimizeSwapBeforeMeasure (#6239)
• mpl circuit drawer does not change the style dict in-place (#6190)
• Pulse Builder: fix seconds_to_samples() for numpy arrays (#6213)
• Better tolerances for gate decompositions (#5827)
• global phase reverse_bits (#6206)
• Fix error on construct_circuit 'a' parameter handling (#6216)
• Allow custom gate color in the MPL circuit drawer (#6184)
• Fix params for a controlled - UnitaryGate (#5780)
• better unrolling in preset passmanagers (#6133)
• Fix SPSA recalibration (#6173)
• Preserve global phase in Unroller (#6155)
• Ensure we include all cython files in sdist (#6163)
• MCZ is now drawn correctly in matplotlib (#5981) (#6008)

Qiskit Terra 0.17.4

Changelog

Fixed

• Respect max_experiments in QuantumInstance BackendV1 path (backport #6391) (#6414)

Qiskit Terra 0.17.3

Changelog

Added

• Add Distributions result objects for Qiskit runtime (#6388)

Fixed

• Fix counts histogram for distributions of differing sizes. (#6390) (#6393)

Qiskit Terra 0.17.2

Changelog

Fixed

• BasisTranslator skips translating gates already in target basis (#6350) (#6356)
• Support multiplication of TaperedPauliSumOp with ParameterExpression (#6315) (#6353)
• Add support on QuantumInstance/run_circuits for Backends that don't handle QasmQobj (backport #6299) (#6343)
• plot_histogram does not raise for neg values (#6340) (#6344)
• Fix bug in Pauli.evolve for CZ, CY, Swap (#6287) (#6296)
• Small fixes in the SparseVectorStateFn (#6272) (#6275)
• Fix expval pauli qargs bug (#6304) (#6328)
• Bugfix in clifford instruction name (#6251) (#6258)

Qiskit Terra 0.17.1

Changelog

Fixed

• global phase reverse_bits (#6206) (#6224)
• Fix error on construct_circuit 'a' parameter handling (#6216) (#6219)
• Allow custom gate color in the MPL circuit drawer (#6184) (#6212)
• Fix params for a controlled - UnitaryGate (#5780) (#6191)
• better unrolling in preset passmanagers (#6133) (#6189)
• Fix SPSA recalibration (#6173) (#6186)
• Fixed duplicated routine name in Shor algorithm (#6114) (#6176)
• Preserve global phase in Unroller (#6155) (#6180)
• Ensure we include all cython files in sdist (#6163) (#6174)

Qiskit Terra 0.17.0

Changelog

Deprecated

• Deprecate Bit.index and Bit.register (#6069)
• ScheduleBlock 3/4 - add ScheduleBlock (#5854)
• Deprecate probability distribution circuits (#6080)
• Deprecate circuit.combine and circuit.extend (#4208)
• Deprecate matmul and mul in qinfo (#5834)
• Improved Pauli operator class (#5261)
• Allow process fidelity to work with a non-unitary target channel (#5339)
• Optimize allocated qubits in arithmetic circuits (#5332)
• Deprecate Python 3.6 support (#5301)
• Migrate qiskit.util module to qiskit.utils (#5420)
• Deprecate schemas in qiskit-terra (#5262)

Added

• ScheduleBlock 3/4 - add ScheduleBlock (#5854)
• Boolean expression object (#5830)
• Overload & and ^ for ciruit.compose and circuit.tensor (#6065)
• Migrate basic aer provider to new versioned interface (#5128)
• add ECR gate and approximation_degree option (#5609)
• Add documentation guide on writing a provider (#5406)
• Enable parallel_map on windows (#3547)
• Add fake backends for new IBM Quantum devices (#6021)
• Add additional basis gates rz, sx, x to basicaer. (#6022)
• Implemented Random Shuffling in CSPLayout (#5994)
• new 16Q device map (#6013)
• Transfer the CNOTDihedral Operator class (#5442)
• Improved Clifford synthesis method (#5779)
• Add reverse_qargs to Operator (#5970)
• Add simplify of U3->U1/U2 in OneQubitEulerDecomposer (#5554)
• Add calibrations with the TemplateOptimization (#5752)
• Allow passmanager.append(flowcontroller) instead of passes (#5772)
• Clifford templates (#5769)
• Easier way to call a pass on a circuit (#5503)
• Enable user defined cost dict for templates (#5521)
• Issue 5549 template matching (#5550)
• More efficient C3X implementation (#5668)
• Add PauliTwoDesign to the circuit library (#5552)
• Add reverse_qargs to Statevector and DensityMatrix (#5464)
• Amplitude Estimation algorithms (#5517)
• Improve decomposition of (multi-)controlled-z (#5572)
• Add PiecewiseChebyshev arithmetic circuit (#5364)
• Add readout_length to backend properties (#5516)
• Improved Pauli operator class (#5261)
• Allow process fidelity to work with a non-unitary target channel (#5339)
• Add metadata attribute to QuantumCircuit (#5270)
• routing_method='none' and Error pass (#5274)
• Allow specifying the last interval in PiecewisePolynomialPauliRotations (#5480)
• Add environment variable for number of procs in parallel_map (#5384)
• ParameterExpression.eq takes bounded expr == value (#5444)
• Add support for circuits and labels in Statevector.equiv (#5215)
• Add integer option to initialize to init using bitmap (#5418)
• Add support for Python 3.9 (#5189)
• Added meas_level and meas_return for circuit jobs (#5452)
• Gradient functionality for parameter expressions (#5181)
• Support complex parameters (#5192)
• Add R(v) gate; rotation wrt rotation vector (#5336)
• Add circuit.tensor (#5295)
• Add PiecewisePolynomialRotations and InverseChebychev to the circuit library (#5219)
• Add user config file options to control parallel execution (#5324)
• fixed issue 3908 by adding trigonometric functions to ParameterExpres… (#4854)
• allow Initialize from labels (#5229)
• Adding Pauli to the standard gate library (#5153)

Changed

• ScheduleBlock 3/4 - add ScheduleBlock (#5854)
• Set sympy.evaluate(False) on frequent code paths for phase tracking. (#6072)
• Migrate basic aer provider to new versioned interface (#5128)
• Added reverse_bits parameter to plot_bloch_multivector() (#5959) (#6014)
• Deprecate matmul and mul in qinfo (#5834)
• QFT little endian (#4849)
• Name-ordered circuit parameters (#5759)
• Make Register and Bit hashed attrs immutable (#5867)
• quantum_info.operator mixin interface refactor (#5617)
• Wrap qiskit.Aer and qiskit.IBMQ with lazy loading object (#5619)
• Change ParameterExpression eq to sympy equals() (#5760)
• Add a lazy loading wrapper class for qiskit_version (#5620)
• ScheduleBlock 1/4 - remove timeslot dependency from instruction (#5681)
• Create explicit C3XGate/C4XGate in MCXGrayCode (#5601)
• Log warning instead of raise exception in channel measures (#5594)
• better initial_layout validation (#5526)
• EquivalenceLibrary.draw to return SVG instead of PNG. (#5355)
• Improved Pauli operator class (#5261)
• Do not execute CSPLayout if layout_method is set in transpile (#5495)
• Add __array__ method to Gate and quantum_info classes (#5402)
• allow statevectors to be parameter in initialize (#5190)
• Move Quaternion from operators to synthesis (#5449)
• Add user config file options to control parallel execution (#5324)
• Register or QuantumCircuit raises when an ambiguous non-integer gets passed to (#4858)

Removed

• Remove deprecated interactive visualizations (#5991)
• Remove circuit methods deprecated in 0.14.0 (#5948)
• Wrap qiskit.Aer and qiskit.IBMQ with lazy loading object (#5619)
• Remove deprecated pulse code (#5564)
• passmanager(..., callback=...) parameter removed (#5522)
• Migrate ApproximateTokenSwapper to only use retworkx and make networkx optional (#5471)
• Remove deprecated DAGCircuit.qubits() and .clbits() methods. (#5433)
• Remove deprecated quantum_info methods (#5439)

Fixed

• no full scheduling of circuits with delay unless explicitly requested (#6084)
• Fix RecursionError in SummedOp.to_pauli_op() and enhance PauliOp.tensor(), PauliSumOp.tensor() (#6111)
• Properly clear parameter table on remove_final_measurement (#6109)
• Fix TaperedPauliSumOp.to_matrix_op() (#6102)
• Fix CalibrationBuilder (#6067)
• Fix condition in BasisTranslator and change node.condition to @Property (#6040)
• Enable consolidate blocks to to work with single gate blocks (#6024)
• Fixes QASM parser to handle U (#6077)
• Subcircuits with classical wires stay right of measures (#5958)
• Update interpretation of meas_map in Qiskit (#5971)
• fix plot_state_city if only real axis is specified (#6015)
• Remove delays from Acquire Channels (#6000)
• fix unique circuit names when binding parameters (#5851)
• Remove DagNode.hash() (#5979)
• make commutative_cancellation basis aware (#5672)
• fix for permutation circuit (#5813)
• • Added left hand side calibrations carry over with + operator. (#5946)
• Fix to carry over calibrations with iadd and add (#5910)
• fix global phase in Instruction.inverse (#5925)
• Fix circular entanglement edge case in NLocal (#5884)
• fix qasm output with open controlled gates (#5688)
• Fixed inconsistency in gate names between text and matplotlib backends (#5360)
• Fix marginal_counts incorrect creg_sizes with Result object and add format_marginal kwarg (#5490)
• Fix parameter handling in global phase (#5807)
• clean classical bits after QuantumCircuit.remove_final_measurements (#5808)
• Global phase in TwoQubitBasisDecomposer (#5764)
• Fix incorrect durations in scheduled circuit (#5778)
• Fix handling of classical bits in timeline drawer and non-treament of delay as idle time (#5662)
• Fix incorrect qargs setting in sabre_swap (#5749)
• Raise if attempting to convert parameterized circuit to qasm. (#5705)
• add matrix rep for delay instruction (#5704)
• Update the definition of the Hellinger fidelity (#5595)
• Add unroll step to level2 passmanager optimization loop (#5671)
• Fix global phase tracking around DAGCircuit.substitute_node. (#5618)
• Fix U2Gate decomposition in QuantumCircuit.u2 deprecation message. (#5660)
• Fix global phase in OneQubitEulerDecomposer using PSX and ZSX basis and in Diagonal gate (#5474)
• Fix & refactor the linear combination of unitaries gradients (#5501)
• Output transpiled circuit in dt (#5563)
• Propagate Pauli phase when evaluating PauliOp (#5602)
• Unroll parametervectors in circuit.execute (#5593)
• Avoid collecting non atomic nodes in 1q runs (#5570)
• Fix global phase handling in circuit.repeat (#5588)
• Use actual gate name in backend monitor (#5546)
• Fix quantum Fisher information computation based on overlap (#5508)
• Add ZSX Euler basis to UnitarySynthesis pass. (#5583)
• Durations populated from calibrations (#5562)
• Test calling BlueprintCircuit.to_instruction directly after construction (#5544)
• Fix unbound template parameters in template substitution (#5534)
• Conditionals must display to the right of measures using the same register (#5397)
• Fixed handling of "decimals" parameter by updating format_statevector and format_unitary (#5347)
• Add missing layout data for ibmq_casablanca. (#5492)
• Fix compensate_phase of pulse.builder.frequency_offset (#5489)
• [Issue 5304]: Typecast to float only if bound to parameters (#5455)
• Convert delays to instructions when assembling (#5481)
• Bug fix to ensure that calibrations are carried over by circuit compose (#5396)
• Optimize allocated qubits in arithmetic circuits (#5332)
• Make optimize_1q_gates U and P aware (#5429)
• Honor initial_layout when coupling map is None (#5346)
• transpile singleton (#5298)
• conditional wires are draw as classical wires in text circuit drawer (#5206)
• Remove lone identity gates in Optimize 1q decomposition pass (#5292)
• fix hash bug (#5379)
• fix hasattr in get_options (#5370)
• Add ZSX basis to one qubit decomposition and optimization pass (#5314)
• Fix bug in quantum channel subtraction (#5343)
• Fix global phase tracking for Unroller, OneQubitEulerDecomposer, and ControlledGate (#5248)
• Fix qubits indexing in Statevector._evolve_instruction (#5286)
• Fix display of backend name in Result.repr (#5284)
• Fix bug: execute valid circuits built with delays (#5302)
• Fix issue with frequency change visualization. (#5253)
• classical_function decorator to handle parsing indented define. (#5288)
• Fix C4XGate QASM definition. (#5265)
• ...

Qiskit Terra 0.16.4

Changelog

Fixed

• Fix incorrect durations in scheduled circuit (bp #5778) (#5792)
• Fix incorrect qargs setting in sabre_swap (#5749) (#5793)
• Global phase in TwoQubitBasisDecomposer (#5764) (#5791)
• Fix compatibility with numpy 1.20.0 (#5788)

Qiskit Terra 0.16.3

Changelog

Fixed

• Fix typo adding non-gates to _collect_1q_runs() output (#5740)