ShiftPhase
class ShiftPhase(phase, channel, name=None)
Bases: qiskit.pulse.instructions.instruction.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
The ShiftPhase instruction causes 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 (
Union[complex,ParameterExpression]) – The rotation angle in radians. - channel (
PulseChannel) – The channel this instruction operates on. - name (
Optional[str]) – Display name for this instruction.
Methods
append
ShiftPhase.append(schedule, name=None)
Return a new Schedule with schedule inserted at the maximum time over all channels shared between self and schedule.
Parameters
- schedule (Union['Schedule', 'Instruction']) – Schedule or instruction to be appended
- name (
Optional[str]) – Name of the new schedule. Defaults to name of self
Returns
A new schedule with schedule a this instruction at t=0.
Return type
ch_duration
ShiftPhase.ch_duration(*channels)
Return duration of the supplied channels in this Instruction.
Parameters
*channels – Supplied channels
Return type
int
ch_start_time
ShiftPhase.ch_start_time(*channels)
Return minimum start time for supplied channels.
Parameters
*channels – Supplied channels
Return type
int
ch_stop_time
ShiftPhase.ch_stop_time(*channels)
Return maximum start time for supplied channels.
Parameters
*channels – Supplied channels
Return type
int
draw
ShiftPhase.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.
Parameters
- dt (
float) – Time interval of samples - style (Optional[SchedStyle]) – A style sheet to configure plot appearance
- filename (
Optional[str]) – Name required to save pulse image - interp_method (
Optional[Callable]) – A function for interpolation - scale (
float) – Relative visual scaling of waveform amplitudes - plot_all (
bool) – Plot empty channels - plot_range (
Optional[Tuple[float]]) – 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 (
Optional[List[Channel]]) – A list of channel names to plot
Returns
A matplotlib figure object of the pulse schedule
Return type
matplotlib.figure
insert
ShiftPhase.insert(start_time, schedule, name=None)
Return a new Schedule with schedule inserted within self at start_time.
Parameters
- start_time (
int) – Time to insert the schedule schedule - schedule (Union['Schedule', 'Instruction']) – Schedule or instruction to insert
- name (
Optional[str]) – Name of the new schedule. Defaults to name of self
Returns
A new schedule with schedule inserted with this instruction at t=0.
Return type
is_parameterized
ShiftPhase.is_parameterized()
Return True iff the instruction is parameterized.
Return type
bool
shift
ShiftPhase.shift(time, name=None)
Return a new schedule shifted forward by time.
Parameters
- time (
int) – Time to shift by - name (
Optional[str]) – Name of the new schedule. Defaults to name of self
Returns
The shifted schedule.
Return type
Attributes
channel
channels
Returns the channels that this schedule uses.
Return type
Tuple[PulseChannel]
duration
Duration of this instruction.
Return type
int
id
Unique identifier for this instruction.
Return type
int
instructions
Iterable for getting instructions from Schedule tree.
Return type
Tuple[Tuple[int, Instruction]]
name
Name of this instruction.
Return type
str
operands
Return instruction operands.
Return type
Tuple
parameters
Parameters which determine the instruction behavior.
Return type
Set
phase
Return the rotation angle enacted by this instruction in radians.
Return type
Union[complex, ParameterExpression]
start_time
Relative begin time of this instruction.
Return type
int
stop_time
Relative end time of this instruction.
Return type
int