Abstract
We investigate the subradiance properties of 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 [A. Piñeiro Orioli and A. M. Rey, Phys. Rev. Lett. 123, 223601 (2019)], perfectly dark subradiant states emerge from the interplay between fermionic statistics and dipolar interactions. While previously we focused on the case, here we provide an in-depth analysis of the single-site dark states for generic filling , 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 multisite 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 or loaded into optical lattices, where they could be used for potential applications in quantum metrology and quantum information.
2 More- Received 23 November 2019
- Accepted 24 February 2020
DOI:https://doi.org/10.1103/PhysRevA.101.043816
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