HiQ Pulse

The working extension is .qcosp, and comments start with #. It describes the schedule itself: ports, frames, waveforms, and what plays when. It lowers to the control level of the IR (qcos-ir/1), and the check returns that document with the length of the schedule, per frame and in total. No route compiles or runs it yet, and no hardware is reached from it.

1pulse rabi2dt 0.5 ns3bits 14port d0 drive qubits 05port m0 measure qubits 06frame f0 on d0 freq 5.1 GHz phase pi/27frame r0 on m0 freq 7000 MHz8waveform g gaussian duration 40 ns amp 0.4 sigma 8 ns9waveform c constant duration 20 ns amp 0.210waveform both composite g, c11play both on f012shift_phase f0 -pi/413set_frequency f0 5.2 GHz14delay 1 ns on f0, r015barrier16capture r0 1 us -> 0

Shapes are constant, ramp (from and to), gaussian (sigma, optional), blackman, kaiser (beta, optional), composite and sampled (re, and optional im). Every time takes ps, ns, us or ms, and every frequency Hz, kHz, MHz or GHz. Every length must be a multiple of dt, and no amplitude may pass 1.

1pulse p2dt 1 ns3waveform w constant duration 1.5 ns amp 1

Examples in this layer

• Rabi→A drive pulse built from a gaussian and a constant waveform.examples/pulse/rabi.qcosp
• Ramsey→Two half-pi pulses around a free evolution delay.examples/pulse/ramsey.qcosp
• Echo→A refocusing pulse between two delays.examples/pulse/echo.qcosp