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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Ferrari, G. Alberti, A. Drullinger, R.E. Poli, N. Prevedelli, M. Schioppo, M. Sorrentino, F. Tino, G.M. |
| Copyright Year | 2007 |
| Description | Author affiliation: Polo Scientifico-Univ. di Firenze, Sesto Fiorentino (Ferrari, G.; Alberti, A.; Drullinger, R.E.; Poli, N.; Prevedelli, M.; Schioppo, M.; Sorrentino, F.; Tino, G.M.) |
| Abstract | Summary form only given. Alkali-earth atoms have an electronic level structure particularly suited for applications in matter-wave interferometry and high-precision laser spectroscopy. Recently atomic strontium was the subject of active research in several fields such as all-optical cooling towards quantum degeneracy and detection of ultra-narrow optical transitions. Because of its small elastic cross-section, we show that ultra-cold $^{88}Sr$ in presence of a lattice potential is also particularly well suited for the realization of inertial sensors to accurately measure forces with micro-metric spatial resolution. By loading the sample into a vertical lattice potential we observe persistent Bloch oscillations with a damping time longer than 10 seconds, and from the measured Bloch frequency we determine the local gravity with a sensitivity of 5 x $10^{-6}$ g. Our result has direct implications in force measurements at small distances from surfaces such as tests of possible deviations form the Newtonian gravity potential at sub-millimetre distances. We will present the status of a force measurement at distances below 20 mum from dielectric and metallic surfaces, which based on ultra-cold atoms undergoing Bloch oscillations. We will also report on the progress towards the realization of an optical frequency standard based on the highly forbidden $^{1}S_{0}-^{3}Po$ 88Sr intercombination line at 698 nm as well as the realization of a laser suited for precision spectroscopy on this transition. |
| Starting Page | 1 |
| Ending Page | 1 |
| File Size | 45810 |
| Page Count | 1 |
| File Format | |
| ISBN | 9781424409303 |
| DOI | 10.1109/CLEOE-IQEC.2007.4386816 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2007-06-17 |
| Publisher Place | Germany |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Strontium Optical interferometry Spectroscopy Force measurement Atom optics Atomic beams Lattices Optical sensors Spatial resolution Laser transitions |
| Content Type | Text |
| Resource Type | Article |
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