1211.4928 (V. P. Shauro et al.)

On the time-optimal implementation of quantum Fourier transform for
qudits represented by quadrupole nucleus    [PDF]

V. P. Shauro, V. E. Zobov

We consider the problem of time-optimal realization of the quantum Fourier transform gate for a single qudit with number of levels d from 3 to 8. As a qudit the quadrupole nucleus with spin I > 1/2 controlled by NMR is considered. We calculate the dependencies of the gate error on the duration of radio-frequency pulse obtained by numerical optimization using Krotov-based algorithm. It is shown that the dependences of minimum time of QFT gate implementation on qudit dimension are different for integer and half-integer spins.

View original: http://arxiv.org/abs/1211.4928