Development of an STFT (short time fourier transform) pulse-generator architecture for the Phaser hardware.
(Block diagram is subject to change)
A general purpose digital quantum computer needs to perform operations with multiple qbits. In a trapped ion system the qbits are represented by energy levels of an ion electron. For a multi ion quantum gate the electrons state needs to be entangled with the state of the electron in another ion. This can be achieved by coupling the electrons to a shared motional (vibrational) mode of the ions. In order to do so, the ions need to be exposed to a modulated driving field, the shape of which might be easily specified with a few parameters in frequency space. This would result in a faster, scalable and more elegant solution than driving the field with a precomputed waveform played back on an AWG.
Discussion and Prototypes
A (very raw) exemplification of some DFT and time-domain relations is given in Shape and Tone FFT.
Pulse leakage shows some spectral leakage effects of a time-limited signal.
It will be developed in migen FHDL and the intent is to build parameterizable and scalable code. Cores to be developed:
- Half-band filters
- CIC filter
- Artiq communication