Delay
class Delay(duration, channel, name=None)
Bases: qiskit.pulse.instructions.instruction.Instruction
A blocking instruction with no other effect. The delay is used for aligning and scheduling other instructions.
Example
To schedule an instruction at time = 10, on a channel assigned to the variable channel, the following could be used:
sched = Schedule(name="Delay instruction example")
sched += Delay(10, channel)
sched += Gaussian(duration, amp, sigma, channel)The channel will output no signal from time=0 up until time=10.
Create a new delay instruction.
No other instruction may be scheduled within a Delay.
Parameters
- duration (
Union[int,ParameterExpression]) – Length of time of the delay in terms of dt. - channel (
Channel) – The channel that will have the delay. - name (
Optional[str]) – Name of the delay for display purposes.
Methods
append
Delay.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
Delay.ch_duration(*channels)
Return duration of the supplied channels in this Instruction.
Parameters
*channels – Supplied channels
Return type
int
ch_start_time
Delay.ch_start_time(*channels)
Return minimum start time for supplied channels.
Parameters
*channels – Supplied channels
Return type
int
ch_stop_time
Delay.ch_stop_time(*channels)
Return maximum start time for supplied channels.
Parameters
*channels – Supplied channels
Return type
int
draw
Delay.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
Delay.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
Delay.is_parameterized()
Return True iff the instruction is parameterized.
Return type
bool
shift
Delay.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
duration
id
Unique identifier for this instruction.
Return type
int
instructions
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
start_time
Relative begin time of this instruction.
Return type
int
stop_time
Relative end time of this instruction.
Return type
int