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]) – A Kernel for integrating raw data.

• discriminator (Optional[Discriminator]) – A Discriminator for 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	Return a new Schedule with schedule inserted at the maximum time over all channels shared between self and schedule.
assign_parameters	Modify and return self with parameters assigned according to the input.
ch_duration	Return duration of the supplied channels in this Instruction.
ch_start_time	Return minimum start time for supplied channels.
ch_stop_time	Return maximum start time for supplied channels.
draw	Plot the instruction.
flatten	Return itself as already single instruction.
insert	Return a new Schedule with schedule inserted within self at start_time.
is_parameterized	Return True iff the instruction is parameterized.
shift	Return a new schedule shifted forward by time.

Attributes

acquire

Acquire channel to acquire data. The AcquireChannel index maps trivially to qubit index.

Return type

AcquireChannel

channel

Return the Channel that this instruction is scheduled on.

Return type

AcquireChannel

channels

Returns the channels that this schedule uses.

Return type

Tuple[Union[AcquireChannel, MemorySlot, RegisterSlot]]

discriminator

Return discrimination settings.

Return type

Discriminator

duration

Duration of this instruction.

Return type

Union[int, ParameterExpression]

id

Unique identifier for this instruction.

Return type

int

instructions

Iterable for getting instructions from Schedule tree.

Return type

Tuple[Tuple[int, Instruction]]

kernel

Return kernel settings.

Return type

Kernel

mem_slot

The classical memory slot which will store the classified readout result.

Return type

MemorySlot

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

RegisterSlot

start_time

Relative begin time of this instruction.

Return type

int

stop_time

Relative end time of this instruction.

Return type

int