2010/10/11 by N. Poli, F. -Y. Wang, M. G. Tarallo +5
Physics and Astronomy · #Advanced Frequency and Time Standards #Cold Atom Physics and Bose-Einstein Condensates #Quantum Mechanics and Applications #physics.atom-ph
paper · pdf · doi:10.1103/physrevlett.106.038501
published as Phys. Rev. Lett. 106, 038501 (2011) · 4 pages, 4 figures
arxiv created 2010/10/11 · openalex publication_date 2011/01/18 · arxiv updated 2011/02/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
We report on a precision measurement of gravitational acceleration using ultracold strontium atoms confined in an amplitude-modulated vertical optical lattice. An uncertainty Δg/g ≈ 10(-7) is reached by measuring at the 5th harmonic of the Bloch frequency. The value obtained with this microscopic quantum system is consistent with the one measured with a classical gravimeter. Using lattice modulation to prepare the atomic sample, we also achieve high visibility of Bloch oscillations for ∼ 20 s. These results can be of relevance for testing gravitational redshift and Newtonian law at micrometer scale.