A Fermi-degenerate three-dimensional optical lattice clock
Abstract
Strontium optical lattice clocks have the potential to simultaneously interrogate millions of atoms with a high spectroscopic quality factor of 4 × 1017. Previously, atomic interactions have forced a compromise between clock stability, which benefits from a large number of atoms, and accuracy, which suffers from density-dependent frequency shifts. Here we demonstrate a scalable solution that takes advantage of the high, correlated density of a degenerate Fermi gas in a three-dimensional (3D) optical lattice to guard against on-site interaction shifts. We show that contact interactions are resolved so that their contribution to clock shifts is orders of magnitude lower than in previous experiments. A synchronous clock comparison between two regions of the 3D lattice yields a measurement precision of 5 × 10-19 in 1 hour of averaging time.
- Publication:
-
Science
- Pub Date:
- October 2017
- DOI:
- 10.1126/science.aam5538
- arXiv:
- arXiv:1702.01210
- Bibcode:
- 2017Sci...358...90C
- Keywords:
-
- PHYSICS;
- Physics - Atomic Physics;
- Condensed Matter - Quantum Gases;
- Quantum Physics
- E-Print:
- 19 pages, 4 figures