channels
This module defines Pulse Channels. Channels include:
- transmit channels, which should subclass
PulseChannel- receive channels, such as
AcquireChannel- non-signal “channels” such as
SnapshotChannel,MemorySlotandRegisterChannel.
Novel channel types can often utilize the ControlChannel, but if this is not sufficient, new channel types can be created. Then, they must be supported in the PulseQobj schema and the assembler.
Classes
AcquireChannel(index) | Acquire channels are used to collect data. |
Channel(index) | Base class of channels. |
ControlChannel(index) | Control channels provide supplementary control over the qubit to the drive channel. |
DriveChannel(index) | Drive channels transmit signals to qubits which enact gate operations. |
MeasureChannel(index) | Measure channels transmit measurement stimulus pulses for readout. |
MemorySlot(index) | Memory slot channels represent classical memory storage. |
PulseChannel(index) | Base class of transmit Channels. |
RegisterSlot(index) | Classical resister slot channels represent classical registers (low-latency classical memory). |
SnapshotChannel() | Snapshot channels are used to specify commands for simulators. |
AcquireChannel
class AcquireChannel(index)
Acquire channels are used to collect data.
Channel class.
Parameters
index (int) – Index of channel.
Raises
PulseError – If index is not a nonnegative integer.
index
Type: int
Return the index of this channel. The index is a label for a control signal line typically mapped trivially to a qubit index. For instance, DriveChannel(0) labels the signal line driving the qubit labeled with index 0.
Return type
int
name
Type: str
Return the shorthand alias for this channel, which is based on its type and index.
Return type
str
Channel
class Channel(index)
Base class of channels. Channels provide a Qiskit-side label for typical quantum control hardware signal channels. The final label -> physical channel mapping is the responsibility of the hardware backend. For instance, DriveChannel(0) holds instructions which the backend should map to the signal line driving gate operations on the qubit labeled (indexed) 0.
Channel class.
Parameters
index (int) – Index of channel.
Raises
PulseError – If index is not a nonnegative integer.
index
Type: int
Return the index of this channel. The index is a label for a control signal line typically mapped trivially to a qubit index. For instance, DriveChannel(0) labels the signal line driving the qubit labeled with index 0.
Return type
int
name
Type: str
Return the shorthand alias for this channel, which is based on its type and index.
Return type
str
prefix
Default value: None
A shorthand string prefix for characterizing the channel type.
ControlChannel
class ControlChannel(index)
Control channels provide supplementary control over the qubit to the drive channel. These are often associated with multi-qubit gate operations. They may not map trivially to a particular qubit index.
Channel class.
Parameters
index (int) – Index of channel.
Raises
PulseError – If index is not a nonnegative integer.
index
Type: int
Return the index of this channel. The index is a label for a control signal line typically mapped trivially to a qubit index. For instance, DriveChannel(0) labels the signal line driving the qubit labeled with index 0.
Return type
int
name
Type: str
Return the shorthand alias for this channel, which is based on its type and index.
Return type
str
DriveChannel
class DriveChannel(index)
Drive channels transmit signals to qubits which enact gate operations.
Channel class.
Parameters
index (int) – Index of channel.
Raises
PulseError – If index is not a nonnegative integer.
index
Type: int
Return the index of this channel. The index is a label for a control signal line typically mapped trivially to a qubit index. For instance, DriveChannel(0) labels the signal line driving the qubit labeled with index 0.
Return type
int
name
Type: str
Return the shorthand alias for this channel, which is based on its type and index.
Return type
str
MeasureChannel
class MeasureChannel(index)
Measure channels transmit measurement stimulus pulses for readout.
Channel class.
Parameters
index (int) – Index of channel.
Raises
PulseError – If index is not a nonnegative integer.
index
Type: int
Return the index of this channel. The index is a label for a control signal line typically mapped trivially to a qubit index. For instance, DriveChannel(0) labels the signal line driving the qubit labeled with index 0.
Return type
int
name
Type: str
Return the shorthand alias for this channel, which is based on its type and index.
Return type
str
MemorySlot
class MemorySlot(index)
Memory slot channels represent classical memory storage.
Channel class.
Parameters
index (int) – Index of channel.
Raises
PulseError – If index is not a nonnegative integer.
index
Type: int
Return the index of this channel. The index is a label for a control signal line typically mapped trivially to a qubit index. For instance, DriveChannel(0) labels the signal line driving the qubit labeled with index 0.
Return type
int
name
Type: str
Return the shorthand alias for this channel, which is based on its type and index.
Return type
str
PulseChannel
class PulseChannel(index)
Base class of transmit Channels. Pulses can be played on these channels.
Channel class.
Parameters
index (int) – Index of channel.
Raises
PulseError – If index is not a nonnegative integer.
index
Type: int
Return the index of this channel. The index is a label for a control signal line typically mapped trivially to a qubit index. For instance, DriveChannel(0) labels the signal line driving the qubit labeled with index 0.
Return type
int
name
Type: str
Return the shorthand alias for this channel, which is based on its type and index.
Return type
str
RegisterSlot
class RegisterSlot(index)
Classical resister slot channels represent classical registers (low-latency classical memory).
Channel class.
Parameters
index (int) – Index of channel.
Raises
PulseError – If index is not a nonnegative integer.
index
Type: int
Return the index of this channel. The index is a label for a control signal line typically mapped trivially to a qubit index. For instance, DriveChannel(0) labels the signal line driving the qubit labeled with index 0.
Return type
int
name
Type: str
Return the shorthand alias for this channel, which is based on its type and index.
Return type
str
SnapshotChannel
class SnapshotChannel
Snapshot channels are used to specify commands for simulators.
Create new snapshot channel.
index
Type: int
Return the index of this channel. The index is a label for a control signal line typically mapped trivially to a qubit index. For instance, DriveChannel(0) labels the signal line driving the qubit labeled with index 0.
Return type
int
name
Type: str
Return the shorthand alias for this channel, which is based on its type and index.
Return type
str