Qiskit-terra

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)

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)

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)

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)

Changelog
Fixed
- Fix import of deprecated gates from qiskit.extensions (4366) (4367)

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)