2016/06/30 by Bei Liu, Gang Jin, Jun He +1
Computer Science · Physics and Astronomy · #Atom (system on chip) #Atomic physics #Caesium #Cold Atom Physics and Bose-Einstein Condensates #Dipole #Nuclear physics #Optics #Photon #Physics #Quantum Information and Cryptography #Quantum optics and atomic interactions #Single-photon source #Trap (plumbing) #physics.atom-ph #quant-ph
paper · pdf · doi:10.1103/physreva.94.013409
10 pages, 7 figures
arxiv created 2016/06/30 · openalex publication_date 2016/07/13 · arxiv updated 2016/08/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We investigate single-cesium-atom heating owing to the momentum accumulation process induced by the resonant pulsed excitation in a microscopic optical dipole trap formed by a strongly focused 1064-nm laser beam. The heating depends on the trap frequency, which restricts the maximum repetition rate of the pulsed excitation. We experimentally verify the heating of a single atom and then demonstrate how to suppress it with an optimized pulsed excitation and cooling method. The typical trap lifetime of a single cesium atom is extended from 108\ifmmode±\else\textpm\fi6\phantom\rule0.16em0ex\ensuremathμs to 2536\ifmmode±\else\textpm\fi31\phantom\rule0.16em0exms, and the corresponding number of excitations increases from \ensuremath∼108 to \ensuremath∼360\phantom\rule0.16em0ex000. In applying this faster cooling method, we use the trapped single cesium atom as a triggered single-photon source at an excitation repetition rate of 10 MHz. The second-order intensity correlations of the emitted single photons are characterized by implementing a Hanbury Brown and Twiss setup, and a clear antibunching effect has been observed.