Qiskit Terra 0.16.2

Changelog

Fixed

• Update the definition of the Hellinger fidelity (bp #5595) (#5703)
• Fix global phase tracking around DAGCircuit.substitute_node. (bp #5618) (#5673)
• More efficient C3X implementation (bp #5668) (#5669)
• Fix U2Gate decomposition in QuantumCircuit.u2 deprecation message. (#5660) (#5663)
• [Stable] Improve 1q decomposition pass with multiple matching basis (#5431) (#5655)
• Fix global phase in OneQubitEulerDecomposer using PSX and ZSX basis and in Diagonal gate (#5474) (#5652)
• Make optimize_1q_gates U and P aware (#5429) (#5651)
• Durations populated from calibrations (#5562) (#5616)
• Convert delays to instructions when assembling (#5481) (#5615)
• Use actual gate name in backend monitor (bp #5546) (#5589)
• Add ZSX Euler basis to UnitarySynthesis pass. (#5583) (#5585)
• Fix global phase handling in circuit.repeat (#5588) (#5592)
• transpile singleton (#5298) (#5507)
• Fix compensate_phase of pulse.builder.frequency_offset (#5489) (#5497)
• Add missing layout data for ibmq_casablanca. (#5492) (#5500)
• Fix bug when multiplying SparsePauliOp by np.int64 (#5417) (#5419)

Qiskit Terra 0.16.1

Changelog

Fixed

• Fix bug in quantum channel subtraction (#5343) (#5357)
• Restore using aqua from release for tutorials job (#5246) (#5307)
• Fix bug: execute valid circuits built with delays (#5302) (#5305)
• Fix display of backend name in Result.repr (#5284) (#5310)
• Fix C4XGate QASM definition. (#5265) (#5308)

Qiskit Terra 0.16.0

Changelog

Deprecated

• Deprecate QuantumCircuit.u1/2/3 (#5083)
• Deprecate MSGate (#4979)
• Deprecate MSBasisDecomposer and remove references in transpiler.py (#5009)

Added

• Add Optimize1qGatesDecomposition to optimize 1q gates using Euler Decomposer (#5216)
• Probability distribution circuits (#5068)
• Add lightweight v2 provider interface starter (#5086)
• Classical Function compiler (#4522)
• Added spherical coords functionality to plot_bloch_vector (#4803)
• Add (piecewise) linear amplitude function to the circuit library (#5110)
• Schedules with Parameters (#5073)
• basicaer handling of global_phase. (#4915)
• [WIP] Pulse Gates: Transpiler changes (part 2) (#5080)
• Make InstructionScheduleMap support ParameterExpressions (#4940)
• Passmanager.remove(index) (#5024)
• Add Grover operator to the circuit library (#4828)
• Pulse Schedule disassembler (#4735)
• User API: support pulse gate calibrations (#4859)

Changed

• Allow ParameterExpressions to be cast to ints (#5001)

Removed

• Remove deprecated DAGNode dict constructor argument (#5201)
• Drop support for python 3.5 (#4926)
• Remove deprecated gate keyword arguments (#4935)
• Removing deprecated gates (#4593)

Fixed

• substitute_node only in single-qubit gates with singleton decompositions (#5225)
• Fixed issue 4697 by updating append method (#4887)
• Build BlueprintCircuit before inverse and compose (#5170)
• Fix in the circuit text drawer when a custom gate with even-length label is controlled (#5091)
• The lookahead_swap pass is global_phase aware (#5172)
• HoareOptimizer pass does preserve state between runs anymore (#5138)
• fix qasm loading of sx/sxdg/u/phase (#5156)
• Layout.from_intlist: Integer list length must equal number of qubits in circuit (#4913)
• Circuit.mcry with mode 'basic' uses MCXVChain (#4787)
• allow integer qarg in QuantumCircuit.unitary (#4955)
• Fix box aspect ratio for Bloch sphere and QSphere (#4893)
• Fix/5056 composite instruction to qasm (#5059)
• Fix global phase for qobj assembly (#5126)
• Fix handling of ancillas in functional Pauli rotations (#5079)
• Fix for a rounding error in plot_state_qsphere() (#4797)
• execute(..., backend=..., passmanager=...) has not conflicting args (#5051)
• Fix latex circuit drawer handling of circuits without gates (#5035)
• Fix random crashes on TextProgressBar (#5034)
• QuantumCircuit.extend updates cached bits (#5039)
• Fix DAGCircuit.compose condition map when handling multiple cregs. (#5026)
• Inverse of MCX gates to include ancillae (#5020)
• Fix Counts object creation with empty input (#5018)
• Fix/5015 QuantumCircuit eq should always return a Bool (#5016)
• Fix inverse in controlled gates (#4976)
• Update PhaseGate.control(n) to return MCPhaseGate (#4994)
• Fix decomposition in UnitaryGate.definition for 1Q gates (#4996)
• Fix pi_check not handling large numbers properly (#4853)
• fixes MCPhaseGate definition (#4989)
• Fix pulse transforms recursion bug fix that was lost in merge conflict (#4974)
• Fix on _bloch_multivector_data (utils.py) when number of qubit is 1 (#4948)
• redress global_phase in controlled UnitaryGate (#4799)
• Update backend snapshots with new conf or defs (#4897)
• Changed default labels for sdg, tdg, sx, and sxdg to None (#4885)

Qiskit Terra 0.15.2

Changelog

Fixed

• QuantumCircuit.extend updates cached bits (#5039) (#5041)
• Fix DAGCircuit.compose condition map when handling multiple cregs. (#5026) (#5029)
• Inverse of MCX gates to include ancillae (#5020) (#5027)
• Fix Counts object creation with empty input (#5018) (#5022)
• Fix inverse in controlled gates (#4976) (#5007)
• Update PhaseGate.control(n) to return MCPhaseGate (#4994) (#5003)
• fixes MCPhaseGate definition (#4989) (#4995)

Qiskit Terra 0.15.1

Changelog

Fixed

• Update backend snapshots with new conf or defs (#4897) (#4898)
• Changed default labels for sdg, tdg, sx, and sxdg to None (#4885) (#4889)

Qiskit Terra 0.15.0

Changelog

Deprecated

• Cleanup leftover SamplePulse mentions (#4730)
• Update plots to work with quantum state classes (#4324)
• Create metaclass to handle tolerances through atol and rtol for Operators and States (#4141)
• Finish issue 4167: SamplePulse->Waveform (#4670)
• Finish issue 4168 (#4662)
• Remove the interactive visualizations (#4438)
• New mpl drawer fixes open issues and adds proportional font text width spacing and labels (#4616)
• Removing condition argument from apply_operation_back (#4135)
• Circuit reverse_bits operation (#4509)
• Unused variables (such as qasm(..., prec)) are being removed (#4192)
• Cache dag qubits/clbits (#4535)
• Remove deprecated multi-qubit acquire instructions (#4505)

Added

• Support for backends with defective qubits and gates (#4782)
• Allow Generator object for seed in QuantumVolume circuit (#4867)
• Sqrt(X) and C-Sqrt(X) gates (#4638)
• Add U and Phase gate (#4765)
• Quadratic form on binary variables circuit (#4800)
• Add synthesis-based translation method. (#4763)
• add global_phase to QuantumCircuit class (#4565)
• Add fake backends for Bogota, Montreal, and Toronto (#4733)
• Add phase estimation circuit to the library (#4685)
• Ancilla qubit type (#4686)
• Pulse builder interface (#4174)
• Add Counts object (#4501)
• Circuit control (#4627)
• Parameter conjugate (#4619)
• Adds BasisTanslator, UnrollCustomDefinitions to default levels. (#4446)
• Sabre layout and routing transpiler passes (#4537)
• Circuit reverse_bits operation (#4509)
• Add SetPhase instruction to pulse (#4540)
• Add rep delay (#4539)
• Add circuit.repeat (#4521)
• Add DAGDependency (#3581)
• Add BasisTranslator and UnrollCustomDefinitions passes. (#4442)
• Add from_networkx method to DAGCircuit class (#4255)
• Add ShiftFrequency instruction to pulse (#4390)
• Add init qubits flag to qobj (#4432)
• add DensityMatrix.to_statevector() for pure states (#4433)
• Add equivalence_library kwarg to circuit_to_{gate,inst} converters. (#4431)
• Update qsphere plots to show state labels and phases (#4384)
• Add support for substituting a Parameter with a ParameterExpression. (#4200)
• Add len to Schedule in Pulse along with related tests. (#4394)
• Add shift frequency qobj instruction - shiftf to schema (#4359)
• Add EquivalenceLibrary.draw() method. (#4196)

Changed

• Update plots to work with quantum state classes (#4324)
• Create metaclass to handle tolerances through atol and rtol for Operators and States (#4141)
• Finish issue 4167: SamplePulse->Waveform (#4670)
• Finish issue 4168 (#4662)
• Removing condition argument from apply_operation_back (#4135)
• QuantumCircuit.to_gate(..., label=...) support (#4478)
• Bugfix: Modified Pulse Style to default to RCParams. (#4470)
• fixed issue 4391 by updating idle_wires() in dagcircuit (#4481)
• Adding support for cregbundle in latex drawer (#4410)
• Allow transformation passes to modify the property set (#4387)
• Rename rescheduler to transform (#4251)
• Remove marshmallow from result/ and requirements (#4030)

Removed

• Remove switchable DAGCircuit implementation (#4386)
• Remove the interactive visualizations (#4438)
• remove deprecated qi functions (#4579)
• Remove almost-one-year-old deprecated methods (warning was inserted in #2683) (#4498)
• remove draw(..., line_length, ...) (deprecated after #3108) (#4507)
• Draw method: remove deprecated channels_to_plot argument (#4508)
• Remove deprecated multi-qubit acquire instructions (#4505)
• Remove circuit_instruction_map deprecated attribute (#4503)
• Remove marshmallow from result/ and requirements (#4030)

Fixed

• Drawers support for "partial" layout (#4795)
• fix dag_visualization in windows (#4794)
• Allow numbers.Integral instead of only built-in int for QuantumRegister index (#4591)
• pi_check qasm includes * between num and pi (#4732)
• Fix broadcast acquire config (#4654)
• QuantumCircuit.num_nonlocal_gates to count only Gate instances. (#4517)
• Fixes DAGCircuit.substitute_node_with_dag mutating input_dag if node has a condition (#4734)
• Fix transpiler failure with circuits containing conditions (#4695)
• Fix cnot method on QuantumCircuit (#4713)
• For DAGCircuit.compose remap condition bits (#4626)
• Fixes bug with cregbundle and conditional gates (#4597)
• New mpl drawer fixes open issues and adds proportional font text width spacing and labels (#4616)
• Add composite circuit definition when calling circuit.qasm() (#3748)
• disallow specifying controlled gate with zero controls. (#4584)
• fixes issue of crashing on unroll of 3+ qubit gates (#4577). (#4596)
• Issue #4182 Initializer should use at most 2^(n+1)-2n cnots (#4183)
• Fix ZZFeatureMap barriers (#4586)
• Set register name for definition of ControlledGates with ctrl_state. (#4582)
• Give MCX implementations more specific names. (#4568)
• Added num_ctrl_bits and ctrl_state to UnitaryGate call to ControlledGate (#4551)
• fix bug in unrolling open controlled basis gates. (#4444)
• Cache dag qubits/clbits (#4535)
• fixed issue 4391 by updating idle_wires() in dagcircuit (#4481)
• Fix #4445 | Bug in scheduler if circuit is empty (#4472)
• Fix disassemble of isometry and added test_disassemble_isometry (#4402)
• Circuit library NLocal string circuit drawer issue (#4468)
• Bugfix: Hz -> GHz conversion for SetFrequency -> PulseQobjInstruction (#4399)
• label support for controlled unitary (#4429)
• Allow bypassing parallel mode at init (#4345)
• MPL circuit drawer can handle multiple super/sub script commands in register name (#3827)
• Fix import of deprecated gates from qiskit.extensions (#4366)

Qiskit Terra 0.14.2

Changelog

Fixed

• Set register name for definition of ControlledGates with ctrl_state. (#4582) (#4583)
• Give MCX implementations more specific names. (#4568) (#4570)
• fix bug in unrolling open controlled basis gates. (#4444) (#4561)
• [Stable] Cache dag qubits/clbits (#4535) (#4558)
• fixed issue 4391 by updating idle_wires() in dagcircuit (#4481) (#4553)
• Circuit library NLocal string circuit drawer issue (#4468) (#4543)
• Add equivalence_library kwarg to circuit_to_{gate,inst} converters. (#4431) (#4534)
• Fix the circuit gate links in docs (#4487) (#4514)
• fixed issue 4133 by updating U3 and U2 definitions (#4165) (#4474)
• Fix #4445 | Bug in scheduler if circuit is empty (#4472) (#4476)
• Add missing T gate to documentation (#4409) (#4428)
• Bugfix: Hz -> GHz conversion for SetFrequency -> PulseQobjInstruction (#4399) (#4434)
• Fix bug in visualization/pulse/matplotlib (#4403) (#4405)

Qiskit Terra 0.14.1

Changelog

Fixed

• Fix import of deprecated gates from qiskit.extensions (#4366) (#4367)

Qiskit Terra 0.14.0

Changelog

Deprecated

• Stop monkeypatching standard gates and move them to circuit/library/standard_gates (#4035)
• add circuit.compose() method (#4190)
• Boolean logic AND and OR to circuit library (#4130)

Added

• Add from_int method to Statevector and DensityMatrix (#4289)
• Global MS gate in circuit library (#4333)
• Iqp circuit added to circuit library (#4266)
• Add new fake backends FakeAthens and FakeRome (#4330)
• Circuit library: GraphState, HLF (#4259)
• Multi-control multi-target gate (#4028)
• N-local circuits for circuit library (#4211)
• Support for cregbundle in text circuit drawer (#4274)
• #3891 | PulseCompression (#4114)
• Add Cifford.from_label method (#4222)
• Use isometry for decomposition of 3+ qubit unitary gates (#4243)
• Blueprint circuit for the circuit library (#4185)
• Add EquivalenceLibrary.has_entry. (#4214)
• Diagonal in circuit library (#4186)
• HamiltonianGate (#4071)
• New fake backends: Cambridge, Paris, London, Valencia, Essex, Armonk (#4129)
• Boolean logic AND and OR to circuit library (#4130)
• Add methods to retrieve info from channels config in backends (#4097)
• Circuit library: QFT (#4072)
• Show instance name in output of pulse drawer (#4122)
• Hoare optimization transpiler pass (#3185)

Changed

• Stop monkeypatching standard gates and move them to circuit/library/standard_gates (#4035)
• add circuit.compose() method (#4190)
• ParametricPulses: rename constantpulse to constant (#4077)
• Remove marshmallow from providers/ (#4016)

Fixed

• Timeslot error fix and tests (#4335)
• missing pass_manager_drawer(..., filename=None) (#4331)
• fixed issue 4292 by updating latex drawer (#4322)
• QuantumCircuit.data modification methods to reset ParameterTable. (#4319)
• text-draw gates when are controlled and with a label (#4262)
• controlled gates label awareness (#4218)
• Fix bug in random_clifford (#4287)
• Transpiling with basis_gates=None disables unrolling (#4263)
• Error checking for time inputs to schedules and instructions (#4224)
• Adds ability to set ctrl_state on standard gates (#4076)
• Handle error on import if pygments < 2.4 is installed (#4229)
• Fix ParameterExpression.subs not detecting parameter name conflicts. (#4199)
• Instruction.is_parameterized to return False when fully bound. (#4198)
• • Fixed SetFrequency name sf -> setf in pulse instructions. (#4213)
• Correct display of cx & ccx gates and fix bug on multi-control gates in text_drawer (#4173)
• For appended circuit add padding for wire labels in text drawing mode (#4095)
• Properly copy registers on circuit copy (#4178)
• Changed pi_check to handle parameter values where possible (#3876)
• fixed issue 3427 by updating interpolation module functions (#3854)
• Fix conversion of numpy.number instruction params to python types. (#4152)

Qiskit Terra 0.13.0

Changelog

Deprecated

• Convert the MCX functions to gates (#4082)
• Deprecate some unneeded methods of QuantumState (#4075)
• Cleanup quantum_info.random (#4058)
• generalize dag.compose_back(), deprecate dag.extend_back() (#3772)
• Add measure probability functions to QuantumState classes (#3952)
• Command/Inst refactor: FrameChange -> ShiftPhase (#3893)
• Improves OneQubitEulerDecomposer class and add RR basis decomposition. (#3703)
• Simplify BaseOperator abstract class (#3875)
• Defaults in TranspileConfig (now called PassManagerConfig) (#3035)

Added

• Add SparsePauliOp operator class (#3932)
• add circuit.num_nonlocal_gates (#4101)
• Optimized clifford synthesis for up to 3 qubits (#4098)
• QuantumVolume and FourierChecking in circuit library (#4102)
• add a name attribute to CouplingMap (#4103)
• Add diamond norm function for quantum channels (#4050)
• Add random Clifford and pauli table functions (#4062)
• Log time for execute steps (#3922)
• Cleanup quantum_info.random (#4058)
• Add Clifford operator class (#3938)
• Add measure and reset methods to QuantumState classes (#4041)
• Add env variable and user config option to suppress packaging warnings (#3362)
• Rename sample_measure to sample_counts and sample_memory (#4056)
• Update Statevector and DensityMatrix evolve to work with operator qargs attr (#3983)
• Jupyter widget for circuit library (#3861)
• Add sample_measure to Statevector and DensityMatrix (#3987)
• Add measure probability functions to QuantumState classes (#3952)
• Add StabilizerTable class (#3931)
• add iswap and dcx gates (#3992)
• Add PauliTable symplectic operator class (#3889)
• Add num_qubits attribute to QuantumState and BaseOperator (#3986)
• Allow generic callable to be inserted in CmdDef (#3385)
• Text drawer support for open controlled gates (#3867)
• Add library of gates with their equivalent circuit implementations. (#3946)
• Add ability to add operators on subsystems. (#3888)
• Implement the RYY gate (#3912)
• Add BaseJob status methods (#3723)
• Add ScalarOp to quantum_info.operators (#3887)
• Revert "Add ScalarOp to quantum_info.operators (#3887)"
• Add ScalarOp to quantum_info.operators (#3887)
• Add qargs property, __call__, method to set qargs to BaseOperators (#3873)
• Add support for backend.run to FakeBackend (#3890)
• Add wait_for_final_state() to BaseJob (#3731)
• start of a circuit library (#3841)
• Support Scheduler in execute pipeline (#3792)

Changed

• Upgrading bind_parameters: allow in place and mixed floats + parameters (#4037)
• Optional parameter basis_gates in Optimize1qGates (#4019)
• Remove marshmallow from RunConfig (#4096)
• Support for circuit.draw(initial_state=False) (#4068)
• Implement multi-controlled U1 as gate (#3883)
• Transpiler should raise when conflicting parameters, not just ignore them silently (#4060)
• layout_method and routing_method selectors in transpile() (#3999)
• Clean up default class atol and rtol for operators and states (#3989)
• Command/Inst refactor: Pulses and Play (#3936)
• set depth/width for LookaheadSwap pass (#3996)
• Populate equivalence library with existing gate definitions. (#3979)
• Command/Inst refactor: Acquire (and Kernel, Discriminator) (#3935)
• Fix preset pass managers to not always decompose Swaps (#3963)
• fix issue 3733 making result.get_counts() return also a list of dicts (#3751)
• Command/Inst refactor: FrameChange -> ShiftPhase (#3893)
• Command/Inst refactor: Snapshot (#3933)
• Allow list params in Instruction (#3955)
• Transition DAGCircuit to retworkx (#3916)
• Command/Inst refactor: Delay (#3924)
• Remove marshmallow from Qobj (#3383)
• Switch DAGCircuit wires property to a set instead of a list (#3934)
• Use CSPLayout in Level 2 and Level 3 (#3391)
• Command/Instruction unification (#3862)
• Improves OneQubitEulerDecomposer class and add RR basis decomposition. (#3703)
• Simplify BaseOperator abstract class (#3875)
• remove identity insertion in gate decomposition (#3879)
• Docathon: schedule.py and remove deprecated buffer arg (#3836)
• Defaults in TranspileConfig (now called PassManagerConfig) (#3035)

Removed

• Remove deprecated code! :) (#4005)
• Remove warnings about dt, dtm, and rep_time units changing (#3981)
• Remove previously deprecated instruction parameter types (#3948)

Fixed

• Add LookaheadSwap condition to prevent hangs (#4112)
• Optimize1qGates should allow rounding when calculating theta (#4015)
• BarrierBeforeFinalMeasurements pass to insert device-wide barrier. (#4054)
• Bugfix: Instruction name / pulse library name mismatch (#4051)
• Each thread needs its own passmanager (#4003)
• Update dt and dtm for FakeAlmaden: it had 'dt' and 'dtm' in units of seconds, but the spec has them in units of ns. (#3991)
• Fix pulse drawer bug for plot range (#3954)
• Fix schedule assember bug (#3900)
• Instruction.copy to deepcopy self._definition if it is set. (#3874)
• Creates dag op for a call of QASM custom gate (#3393)
• Fix substitute parameters when decomposing composite gates (#3914)
• Fixed issue #3806 by checking if QuantumCircuit args can be cast to int (#3869)
• Fix circuit extending with self (#3843)