Adds drive_channel, measure_channel, acquire_channel, and control_channel methods to DynamicsBackend, and includes tests for these methods.
Details
The drive_channel, measure_channel, and acquire_channel methods first check if the requested qubit index is in options.subsystem_list, and if so, returns pulse.ChannelClass(qubit) (where ChannelClass is either DriveChannel, MeasureChannel, or AcquireChannel).
As there isn't an automatic relationship between control channels and any existing backend parameters, to implement control_channel, a further option, control_channel_map, has been added. This is a user-specified dictionary indication a mapping between control channel labels and control channel indices. E.g. a control channel map specified as {(0, 1): 0} could be used to indicate that the control channel associated with a CR drive from qubit 0 with target 1 is pulse.ControlChannel(0). If this option is specified, then control_channel uses the dictionary to return the correct ControlChannel instance. The default for the option is None. When None, the control_channel will raise a NotImplementedError, which is the default behaviour from the base class.
Tests have been added to verify validation steps are working, and that the methods return the correct channels.
Summary
Closes #144
Adds
drive_channel,measure_channel,acquire_channel, andcontrol_channelmethods toDynamicsBackend, and includes tests for these methods.Details
The
drive_channel,measure_channel, andacquire_channelmethods first check if the requested qubit index is inoptions.subsystem_list, and if so, returnspulse.ChannelClass(qubit)(whereChannelClassis eitherDriveChannel,MeasureChannel, orAcquireChannel).As there isn't an automatic relationship between control channels and any existing backend parameters, to implement
control_channel, a further option,control_channel_map, has been added. This is a user-specified dictionary indication a mapping between control channel labels and control channel indices. E.g. a control channel map specified as{(0, 1): 0}could be used to indicate that the control channel associated with a CR drive from qubit 0 with target 1 ispulse.ControlChannel(0). If this option is specified, thencontrol_channeluses the dictionary to return the correctControlChannelinstance. The default for the option isNone. WhenNone, thecontrol_channelwill raise aNotImplementedError, which is the default behaviour from the base class.Tests have been added to verify validation steps are working, and that the methods return the correct channels.