Time-domain grating with a periodically driven qutrit
Abstract
Physical systems in the time domain may exhibit analogous phenomena in real space, such as time crystals, time-domain Fresnel lenses, and modulational interference in a qubit. Here we report the experimental realization of time-domain grating using a superconducting qutrit in periodically modulated probe and control fields via two schemes: Simultaneous modulation and complementary modulation. Both experimental and numerical results exhibit modulated Autler-Townes (AT) and modulation-induced diffraction (MID) effects. Theoretical results also confirm that the peak positions of the interference fringes of AT and MID effects are determined by the usual two-level relative phases, while the observed diffraction fringes, appearing only in the complementary modulation, are however related to the three-level relative phase. Further analysis indicates that such a single-atom time-domain diffraction originates from the correlation effect between the two time-domain gratings. Moreover, we find that the widths of the diffraction fringes are independent of the control-field power. Our results shed light on the experimental exploration of quantum coherence for modulated multi-level systems and may find promising applications in fast all-microwave switches and quantum-gate operations in the strong-driving regime.
Cite
@article{arxiv.1901.10295,
title = {Time-domain grating with a periodically driven qutrit},
author = {Yingying Han and Xiao-Qing Luo and Tie-Fu Li and Wenxian Zhang and Shuai-Peng Wang and J. S. Tsai and Franco Nori and J. Q. You},
journal= {arXiv preprint arXiv:1901.10295},
year = {2019}
}