qiskit.pulse.builder.align_left

align_left()

Left alignment pulse scheduling context.

Pulse instructions within this context are scheduled as early as possible by shifting them left to the earliest available time.

Examples:

from qiskit import pulse

d0 = pulse.DriveChannel(0)
d1 = pulse.DriveChannel(1)

with pulse.build() as pulse_prog:
    with pulse.align_left():
        # this pulse will start at t=0
        pulse.play(pulse.Constant(100, 1.0), d0)
        # this pulse will start at t=0
        pulse.play(pulse.Constant(20, 1.0), d1)
pulse_prog = pulse.transforms.block_to_schedule(pulse_prog)

assert pulse_prog.ch_start_time(d0) == pulse_prog.ch_start_time(d1)

Yields

None

Return type

AbstractContextManager[None]