Microwave seminar | 17 April 2025

Recent advances have made large-scale quantum processor prototypes technologically accessible. These systems, while still noisy and dissipative, also pose significant challenges for achieving optimal control.
In this talk, I will present a model problem of quantum state transfer in a large, nearest-neighbor-coupled qubit array. I will introduce an optimal control strategy that simultaneously maximizes fidelity and minimizes transfer time. Furthermore, I will discuss the robustness of this protocol against random fluctuations in qubit eigenfrequencies and in the coupling control functions.

Main paper/arXiv, related to the seminar, and other references

A. A. Stepanenko, K. S. Chernova, M. A. Gorlach, "Time-optimal transfer of the quantum state in long qubit arrays," arXiv:2501.11933 (2025) https://arxiv.org/abs/2501.11933
K. S. Chernova, A. A. Stepanenko, and M. A. Gorlach, "Optimizing state transfer in a three-qubit array via quantum brachistochrone method [Invited]," Opt. Mater. Express 15, 578-585 (2025)