Subradiance of multilevel fermionic atoms in arrays with filling n≥2

Author
Abstract
We investigate the subradiance properties of n≥2 multilevel fermionic atoms loaded into the lowest motional level of a single trap (e.g.~a single optical lattice site or an optical tweezer). As pointed out in our previous work [arXiv:1907.05541], perfectly dark subradiant states emerge from the interplay between fermionic statistics and dipolar interactions. While in [arXiv:1907.05541] we focused on the n=2 case, here we provide an in-depth analysis of the single-site dark states for generic filling n, and show a tight connection between generic dark states and total angular momentum eigenstates. We show how the latter can also be used to understand the full eigenstate structure of the single-site problem, which we analyze numerically. Apart from this, we discuss two possible schemes to coherently prepare dark states using either a Raman transition or an external magnetic field to lift the Zeeman degeneracy. Although the analysis focuses on the single-site problem, we show that multi-site dark states can be trivially constructed in any geometry out of product states of single-site dark states. Finally, we discuss some possible implementations with alkaline-earth(-like) atoms such as 171Yb or 87Sr loaded into optical lattices, where they could be used for potential applications in quantum metrology and quantum information.
Year of Publication
2020
Journal
Physical Review Letters A
Volume
101
Issue
043816
Date Published
2020-04
URL
https://arxiv.org/abs/1910.13100
DOI
10.1103/PhysRevA.101.043816
JILA PI
Associated Institutes
Journal Article