ShiftPhase#

class qiskit.pulse.instructions.ShiftPhase(phase, channel, name=None)[fuente]#

Bases: Instruction

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].

Parámetros:

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

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

  • name (str | None) – Display name for this instruction.

Attributes

channel#

Return the Channel that this instruction is scheduled on.

channels#

Returns the channels that this schedule uses.

duration#

Duration of this instruction.

id#

Unique identifier for this instruction.

instructions#

Iterable for getting instructions from Schedule tree.

name#

Name of this instruction.

operands#

Return instruction operands.

parameters#

Parameters which determine the instruction behavior.

phase#

Return the rotation angle enacted by this instruction in radians.

start_time#

Relative begin time of this instruction.

stop_time#

Relative end time of this instruction.

Methods

append(schedule, name=None)#

Return a new Schedule with schedule inserted at the maximum time over all channels shared between self and schedule.

Parámetros:

  • schedule (Union['Schedule', 'Instruction']) – Schedule or instruction to be appended

  • name (str | None) – Name of the new schedule. Defaults to name of self

Devuelve:

A new schedule with schedule a this instruction at t=0.

Tipo del valor devuelto:

Schedule

ch_duration(*channels)#

Return duration of the supplied channels in this Instruction.

Parámetros:

*channels (List[Channel]) – Supplied channels

Tipo del valor devuelto:

int

ch_start_time(*channels)#

Return minimum start time for supplied channels.

Parámetros:

*channels (List[Channel]) – Supplied channels

Tipo del valor devuelto:

int

ch_stop_time(*channels)#

Return maximum start time for supplied channels.

Parámetros:

*channels (List[Channel]) – Supplied channels

Tipo del valor devuelto:

int

draw(dt=1, style=None, filename=None, interp_method=None, scale=1, plot_all=False, plot_range=None, interactive=False, table=True, label=False, framechange=True, channels=None)#

Plot the instruction.

Obsoleto desde la versión 0.23.0: The method qiskit.pulse.instructions.instruction.Instruction.draw() is deprecated as of qiskit-terra 0.23.0. It will be removed no earlier than 3 months after the release date. No direct alternative is being provided to drawing individual pulses. But, instructions can be visualized as part of a complete schedule using qiskit.visualization.pulse_drawer.

Parámetros:

  • dt (float) – Time interval of samples

  • style (Optional[SchedStyle]) – A style sheet to configure plot appearance

  • filename (str | None) – Name required to save pulse image

  • interp_method (Callable | None) – A function for interpolation

  • scale (float) – Relative visual scaling of waveform amplitudes

  • plot_all (bool) – Plot empty channels

  • plot_range (Tuple[float] | None) – A tuple of time range to plot

  • interactive (bool) – When set true show the circuit in a new window (this depends on the matplotlib backend being used supporting this)

  • table (bool) – Draw event table for supported instructions

  • label (bool) – Label individual instructions

  • framechange (bool) – Add framechange indicators

  • channels (List[Channel] | None) – A list of channel names to plot

Devuelve:

A matplotlib figure object of the pulse schedule

Tipo del valor devuelto:

matplotlib.figure

insert(start_time, schedule, name=None)#

Return a new Schedule with schedule inserted within self at start_time.

Parámetros:

  • start_time (int) – Time to insert the schedule schedule

  • schedule (Union['Schedule', 'Instruction']) – Schedule or instruction to insert

  • name (str | None) – Name of the new schedule. Defaults to name of self

Devuelve:

A new schedule with schedule inserted with this instruction at t=0.

Tipo del valor devuelto:

Schedule

is_parameterized()#

Return True iff the instruction is parameterized.

Tipo del valor devuelto:

bool

shift(time, name=None)#

Return a new schedule shifted forward by time.

Parámetros:

  • time (int) – Time to shift by

  • name (str | None) – Name of the new schedule. Defaults to name of self

Devuelve:

The shifted schedule.

Tipo del valor devuelto:

Schedule