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)