Enhancing ground-state interaction strength of neutral atoms via Floquet stroboscopic dynamics

Year: 2026

Authors: Wei Y., Artoni M., La Rocca G.C., Wu J.H., Shao X.Q.

Autors Affiliation: Northeast Normal Univ, Ctr Quantum Sci, Changchun 130024, Jilin, Peoples R China; Northeast Normal Univ, Sch Phys, Changchun 130024, Jilin, Peoples R China; Brescia Univ, Dept Engn & Informat Technol, I-25133 Brescia, Italy; CNR, European Lab Nonlinear Spect, I-50019 Sesto Fiorentino, Italy; CNR, Ist Nazl Ottica, I-50019 Sesto Fiorentino, Italy; Scuola Normale Super Pisa, NEST, I-56126 Pisa, Italy; Yanbian Univ, Inst Quantum Sci & Technol, Yanji 133002, Jilin, Peoples R China.

Abstract: Neutral-atom systems are promising platforms for quantum simulation and computation, owing to their long coherence times. However, their intrinsically weak ground-state interactions pose a major limitation to the advancement of scalable quantum simulation and computation. To address this challenge, we propose an approach to enhancing the ground-state interaction strength of neutral atoms via Floquet modulation of a Rydberg atomic ensemble. Each Floquet period consists of ground-state coupling followed by a pulse driving the transition from the ground state to the Rydberg state. Theoretical analysis and numerical simulations demonstrate that after a defined evolution time, neutral atoms within Rydberg ensembles can collectively form a W state in the ground-state manifold. Even when the Rydberg interaction strength is far below the blockade regime, the fidelity remains remarkably high. Finally, we analyze the application of this scheme in the preparation of single-photon sources. In general, our proposed mechanism offers an efficient and highly controllable method for quantum state preparation within the Rydberg atomic ensembles, significantly enhancing the accuracy and stability of quantum state engineering while providing a well-controlled quantum environment for single-photon generation.

Journal/Review: PHYSICAL REVIEW A

Volume: 113 (3)      Pages from: 32812-1  to: 32812-16

More Information: This work was supported by the National Natural Science Foundation of China (Grants No. 12174048 and No. 62375047) , the Italian PNRR MUR (G rant No. PE0000023-NQSTI) , Photonics and Quantum Sciences (Grant No. PdGP/GePro 2024-2026) , and the Fund for International Activities of the University of Brescia.
KeyWords: Quantum Nonlinear Optics; Python Framework; Single Photons; Qutip; Qubit
DOI: 10.1103/7zjs-73qm