2024/11/10 by Jiadu Lin, Qing-Dong Jiang, Lin, Jiadu +1
Computer Science · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Physics of Superconductivity and Magnetism #Quantum Gases (cond-mat.quant-gas) #Quantum Information and Cryptography #Quantum Physics (quant-ph)
paper · pdf · doi:10.48550/arxiv.2411.06619
openalex publication_date 2024/11/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
We study the ponderomotive potential of a bosonic Josephson junction periodically modulated by a high-frequency electromagnetic field. Within the small population difference approximation, the ponderomotive drive induces the well-known Kapitza pendulum effect, stabilizing a π-phase mode. We discuss the parameter dependence of the dynamical transition from macroscopic quantum self-trapping to π-Josephson oscillations. Furthermore, we examine the situation where the small population difference approximation fails. In this case, an essential momentum-shortening effect emerges, leading to a stabilized π/2-phase mode under certain conditions. By mapping this to a classical pendulum scenario, we highlight the uniqueness and limitations of the π/2-phase mode in bosonic Josephson junctions.