Changelog

Deprecated

• Deprecate cmd def (#3573)
• TranspilerAccessError is deprecated in favor of TranspilerError (#3222)
• Deprecate qx_color_scheme() (#3220)
• Mostly remove sympy and deprecate sympy Instruction parameters (#3156)
• Remove buffer options in Pulse (#3297)

Added

• Format pulse defaults (#3526)
• Add argument to ignore framechange only channels for schedules drawing (#3441)
• Use Enum for meas_level and meas_return (#3493)
• Add ability to get counts from statevectors and density matrices (#3514)
• Add Hellinger fidelity discrete probability measure. (#3510)
• Result marginal counts (#3446)
• CSP layout selector (#3043)
• add ControlledGate class (#2862)
• Add from_label to Operator class (#3342)
• Add layout score analysis pass (#3321)
• Add Instruction.is_parameterized() (#3328)
• Add support for slicing and concatenation of PassManagers (#3209)
• Add R gate to standard gates (#3341)
• Parallel support for PassManager.run() (#3290)
• Add dual of mpl mathtext syntax for latex drawer labels (#3224)
• Add alias for cnot function to cx() (#3255)
• Auto Scale PulseScheduler drawing (#3180)
• Basic pulse scheduler (#2650)

Changed

• The exceptions QiskitError qiskit/circuit/* are being replaced by CircuitError (a QiskitError subclass) (#3210)
• Move barrier_before_final_measurements to 'passes' directory (#3260)

Removed

• remove CXBase (#3543)
• Remove implicit string cast of the snapshot label (#3544)
• Remove deprecated UBase gate (#3539)
• Round of deprecation removal (#3190)
• Removing U0Gate (#3431)

Fixed

• Add validation of backend memory support when executing with memory=True (#3528)
• Fix side effects of setting numpy.random.seed (#3541)
• fix no reg depth (#3513)
• Gate parameters support mix of indexes and bits (#3490)
• Deal with None as return from job.queue_position() (#3458)
• Fix Schedule Plot reflecting duration of final schedule even if it is not plotted (#3418)
• Fixes bug in concurrence using eigh instead of eigvals for possibly non-hermitian matrices (#3376)
• Stop setting explicit background color in plot_histogram() (#3277)
• Fix matplotlib with wide parameters (#3354)
• Fix bug in align_acquires where measurement pulses had to be added before AcquireInstructions (#3307)
• Collect2qBlocks, CommutationAnalysis to ignore parameterized gates. (#3288)
• In plot_state_city, make the z=0 plane extend to the axes limits on all sides. (#3211)
• CouplingMap.distance was returning non-int (#3323)
• Added in custom unitary to qasm (#3069)
• Removed the usage of stochastic swap trivial_flag as it can lead to single-qubit gates being omitted (#3285)
• Better handling when empty instructions are unrolled or inverse (#3274)