Microwave seminar | 17 April 2025
begins at
17 April 2025
4:00 PM (GMT +03:00)
location:
Birzhevaya 4 + Online
En
Dr. Andrei Stepanenko
London Institute for Mathematical Sciences, Royal Institution, London, UK
Avoiding traffic jams on long qubit chains: time-optimal quantum state transfer
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Abstract
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.
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)