qiskit.pulse.instructions.ShiftPhase
class ShiftPhase(phase, channel, 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
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.
__init__
__init__(phase, channel, name=None)
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
__init__(phase, channel[, name]) | Instantiate a shift phase instruction, increasing the output signal phase on channel by phase [radians]. |
append(schedule[, name]) | Return a new Schedule with schedule inserted at the maximum time over all channels shared between self and schedule. |
assign_parameters(value_dict) | Modify and return self with parameters assigned according to the input. |
ch_duration(*channels) | Return duration of the supplied channels in this Instruction. |
ch_start_time(*channels) | Return minimum start time for supplied channels. |
ch_stop_time(*channels) | Return maximum start time for supplied channels. |
draw([dt, style, filename, interp_method, …]) | Plot the instruction. |
flatten() | Return itself as already single instruction. |
insert(start_time, schedule[, name]) | Return a new Schedule with schedule inserted within self at start_time. |
is_parameterized() | Return True iff the instruction is parameterized. |
shift(time[, name]) | Return a new schedule shifted forward by time. |
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. |
append
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
assign_parameters
assign_parameters(value_dict)
Modify and return self with parameters assigned according to the input.
Parameters
value_dict (Dict[ParameterExpression, Union[ParameterExpression, float, int]]) – A mapping from Parameters to either numeric values or another Parameter expression.
Return type
Instruction
Returns
Self with updated parameters.
ch_duration
ch_duration(*channels)
Return duration of the supplied channels in this Instruction.
Parameters
*channels – Supplied channels
Return type
int
ch_start_time
ch_start_time(*channels)
Return minimum start time for supplied channels.
Parameters
*channels – Supplied channels
Return type
int
ch_stop_time
ch_stop_time(*channels)
Return maximum start time for supplied channels.
Parameters
*channels – Supplied channels
Return type
int
channel
channels
draw
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
duration
Duration of this instruction.
Return type
int
flatten
flatten()
Return itself as already single instruction.
Return type
Instruction
id
Unique identifier for this instruction.
Return type
int
insert
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
instructions
Iterable for getting instructions from Schedule tree.
Return type
Tuple[Tuple[int, Instruction]]
is_parameterized
is_parameterized()
Return True iff the instruction is parameterized.
Return type
bool
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]
shift
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
start_time
Relative begin time of this instruction.
Return type
int
stop_time
Relative end time of this instruction.
Return type
int