ShiftPhase

class ShiftPhase(phase, channel=None, name=None)

The shift phase instruction updates the modulation phase of proceeding pulses played on the same Channel. It is a relative increase in phase determined by the phase operand.

In particular, a PulseChannel creates pulses of the form

\[Re[\exp(i 2\pi f jdt + \phi) d_j].\]

The ShiftPhase instruction causes \(\phi\) to be increased by the instruction’s phase operand. This will affect all pulses following on the same channel.

The qubit phase is tracked in software, enabling instantaneous, nearly error-free Z-rotations by using a ShiftPhase to update the frame tracking the qubit state.

Instantiate a shift phase instruction, increasing the output signal phase on channel by phase [radians].

Parameters

• phase (complex) – The rotation angle in radians.

• channel (Optional[PulseChannel]) – The channel this instruction operates on.

• name (Optional[str]) – Display name for this instruction.

Attributes

ShiftPhase.channel	Return the Channel that this instruction is scheduled on.
ShiftPhase.channels	Returns channels that this schedule uses.
ShiftPhase.command	The associated command.
ShiftPhase.duration	Duration of this instruction.
ShiftPhase.id	Unique identifier for this instruction.
ShiftPhase.instructions	Iterable for getting instructions from Schedule tree.
ShiftPhase.name	Name of this instruction.
ShiftPhase.operands	Return instruction operands.
ShiftPhase.phase	Return the rotation angle enacted by this instruction in radians.
ShiftPhase.start_time	Relative begin time of this instruction.
ShiftPhase.stop_time	Relative end time of this instruction.
ShiftPhase.timeslots	Occupied time slots by this instruction.

Methods

ShiftPhase.__call__(channel)	Return a new ShiftPhase instruction supporting the deprecated syntax of FrameChange.
ShiftPhase.append(schedule[, name])	Return a new Schedule with schedule inserted at the maximum time over all channels shared between self and schedule.
ShiftPhase.ch_duration(*channels)	Return duration of the supplied channels in this Instruction.
ShiftPhase.ch_start_time(*channels)	Return minimum start time for supplied channels.
ShiftPhase.ch_stop_time(*channels)	Return maximum start time for supplied channels.
ShiftPhase.draw([dt, style, filename, …])	Plot the instruction.
ShiftPhase.flatten()	Return itself as already single instruction.
ShiftPhase.insert(start_time, schedule[, name])	Return a new Schedule with schedule inserted within self at start_time.
ShiftPhase.shift(time[, name])	Return a new schedule shifted forward by time.
ShiftPhase.union(*schedules[, name])	Return a new schedule which is the union of self and schedule.