Trapping of single atom and precise control of its coupling strength in micro-optical cavity

• DOI: 10.7498/aps.72.20222220
• Publication Date: 2023-04-11T06:51:29Z
• Authors: Wei-Zhi Yan; Qing Fan; Peng-Fei Yang; Gang Li; Peng-Fei Zhang; Tian-Cai Zhang
• Keywords: Optical cavity; Finesse

Cavity quantum electrodynamic system with strongly coupled single atoms provides a good platform for studying information processing, simulation, network, and distributed computing. Cooling trapping is crucial technique in the technology. At present, high-finesse cavity finite space, cooling big challenge, even though it mature free space. Great efforts have been made to cool trap inside cavity, trapped atom its lifetime has reached as long tens of seconds. Developing more flexible method still essential system. In this work, we demonstrate experimentally that cesium can be by utilizing optical tweezer settled mode, (2.60 ± 0.18) s. The experiment carried out Fabry-Perot which assembled two concave mirrors each curvature radius 100 mm, length 335 μm. surfaces are highly reflective, finesse 6.1 × 10<sup>4</sup>. 1080 nm waist 2 μm formed an achromatic lens group numerical aperture 0.4. first, precooled atomic assemble released from magneto-optical (MOT) transferred into mode dipole 36 Then, one successfully captured aid mechanism. A blue detuned locking laser used standing-wave along axis. signal obtained recording transmission will decrease owing strong coupling induced vacuum Rabi splitting. Finally, precise manipulation atom-cavity strength, achieved scanning position step using high-precision translation stage. realized work study dynamics atom-photon interactions adjustable strength. addition, mechanism adopted compatible constructing arrays thus possesses flexibility great potentials cavity-based entanglement simulation.