Robust Rydberg gate via Landau-Zener control of Förster resonance

Huang, Xi-Rong; Ding, Zong-Xing; Hu, Chang-Sheng; Shen, Li-Tuo; Li, Weibin; Wu, Huaizhi; Zheng, Shi-Biao

Abstract

In this paper, we propose a scheme to implement the two-qubit controlled-Z gate via the Stark-tuned Förster interaction of Rydberg atoms, where the Förster defect is driven by a time-dependent electric field of a simple sinusoidal function while the matrix elements of the dipole-dipole interaction are time independent. It is shown that when the system is initially in a specific state, it makes a cyclic evolution after a preset interaction time, returning to the initial state, but picks up a phase, which can be used for realizing a two-atom controlled-Z gate. Due to the interference of sequential Landau-Zener transitions, the population and phase of the state is quasideterministic after the cyclic evolution and therefore the gate fidelity is insensitive to fluctuations of the interaction time and the dipole-dipole matrix elements. Feasibility of the scheme realized with Cs atoms is discussed in detail, which shows that the two-qubit gate via Landau-Zener control can be realized with the state-of-the-art experimental setup.

Citation

Huang, X.-R., Ding, Z.-X., Hu, C.-S., Shen, L.-T., Li, W., Wu, H., & Zheng, S.-B. (2018). Robust Rydberg gate via Landau-Zener control of Förster resonance. Physical Review A, 98(5), Article 052324. https://doi.org/10.1103/physreva.98.052324

• Journal Article Type: Article
• Acceptance Date: Oct 23, 2018
• Online Publication Date: Nov 19, 2018
• Publication Date: Nov 19, 2018
• Deposit Date: Nov 19, 2018
• Publicly Available Date: Nov 20, 2018
• Journal: Physical Review A
• Print ISSN: 2469-9926
• Electronic ISSN: 2469-9934
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 98
• Issue: 5
• Article Number: 052324
• DOI: https://doi.org/10.1103/physreva.98.052324
• Public URL: https://nottingham-repository.worktribe.com/output/1286073
• Publisher URL: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.98.052324
• Contract Date: Nov 20, 2018