English

Universal speeded-up adiabatic geometric quantum computation in three-level systems via counterdiabatic driving

Quantum Physics 2019-09-04 v2

Abstract

Universal speeded-up adiabatic geometric quantum computation~(SAGQC) is studied in Λ\Lambda-type three-level system with different coupling cases, i.e., time-dependent detuning, large detuning and one-photon resonance couplings, respectively. In these cases, the counterdiabatic driving method is used to speed up the universal quantum computation. These schemes in Λ\Lambda-type three-level system are feasible in experiment because additional unaccessible ground-state-coupling is not needed. Only the shapes and phases of the initial adiabatic classical-field pulse are modified with the aid of effective two-level systems based on the counterdiabatic driving. The speed and robustness against decay of these schemes are discussed and compared. In addition, our work enriches the study of the speeded-up geometric computation in Λ\Lambda-type three-level system and can be applied to various experimental platforms with different coupling features.

Keywords

Cite

@article{arxiv.1811.07566,
  title  = {Universal speeded-up adiabatic geometric quantum computation in three-level systems via counterdiabatic driving},
  author = {J. L. Wu and S. L. Su},
  journal= {arXiv preprint arXiv:1811.07566},
  year   = {2019}
}

Comments

13 pages,6 figures