Acquire
class Acquire(duration, channel, mem_slot=None, reg_slot=None, kernel=None, discriminator=None, name=None)
Bases: qiskit.pulse.instructions.instruction.Instruction
The Acquire instruction is used to trigger the ADC associated with a particular qubit; e.g. instantiated with AcquireChannel(0), the Acquire command will trigger data collection for the channel associated with qubit 0 readout. This instruction also provides acquisition metadata:
- the number of cycles during which to acquire (in terms of dt),
- the register slot to store classified, intermediary readout results,
- the memory slot to return classified results,
- the kernel to integrate raw data for each shot, and
- the discriminator to classify kerneled IQ points.
Create a new Acquire instruction.
Parameters
- duration (
Union[int,ParameterExpression]) – Length of time to acquire data in terms of dt. - channel (
AcquireChannel) – The channel that will acquire data. - mem_slot (
Optional[MemorySlot]) – The classical memory slot in which to store the classified readout result. - reg_slot (
Optional[RegisterSlot]) – The fast-access register slot in which to store the classified readout result for fast feedback. - kernel (
Optional[Kernel]) – AKernelfor integrating raw data. - discriminator (
Optional[Discriminator]) – ADiscriminatorfor discriminating kerneled IQ data into 0/1 results. - name (
Optional[str]) – Name of the instruction for display purposes.
Raises
PulseError – If channels are supplied, and the number of register and/or memory slots does not equal the number of channels.
Methods
append
Acquire.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
Acquire.ch_duration(*channels)
Return duration of the supplied channels in this Instruction.
Parameters
*channels – Supplied channels
Return type
int
ch_start_time
Acquire.ch_start_time(*channels)
Return minimum start time for supplied channels.
Parameters
*channels – Supplied channels
Return type
int
ch_stop_time
Acquire.ch_stop_time(*channels)
Return maximum start time for supplied channels.
Parameters
*channels – Supplied channels
Return type
int
draw
Acquire.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
Acquire.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
Acquire.is_parameterized()
Return True iff the instruction is parameterized.
Return type
bool
shift
Acquire.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
acquire
Acquire channel to acquire data. The AcquireChannel index maps trivially to qubit index.
Return type
channel
channels
Returns the channels that this schedule uses.
Return type
Tuple[Union[AcquireChannel, MemorySlot, RegisterSlot]]
discriminator
Return discrimination settings.
Return type
Discriminator
duration
id
Unique identifier for this instruction.
Return type
int
instructions
kernel
Return kernel settings.
Return type
Kernel
mem_slot
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
reg_slot
The fast-access register slot which will store the classified readout result for fast-feedback computation.
Return type
start_time
Relative begin time of this instruction.
Return type
int
stop_time
Relative end time of this instruction.
Return type
int