Magic wavelengths for the 6S-7P transition of cesium atoms

For the trapped pre-cooled atoms in an optical dipole trap (ODT), the magic-wavelength ODT can eliminate the differential light shift of the transition between two atomic states, so that the transition frequency between the two states is the same as that of atoms in the free space, which is of great significance for improving the experimental repetition rate and reducing the atomic decoherence in the fields of cold atom physics, quantum optics, and precision measurement. Here we calculate the dynamic polarizabilities of cesium 6S ground state and 7P excited state by using the multi-level model for the ODT with laser wavelength from 1200 to 2000 nm. The magic wavelengths of ODT are obtained for the linearly and circularly polarized laser beams at the intersection of dynamic polarizabilities of two atomic states. Furthermore, we analyze the robustness of the magic trapping conditions and the feasibility of the experimental operation near the telecom C-band wavelength.

Automated summary

By studying the magic-wavelength optical dipole trap (ODT) for pre-cooled atoms, the differential light shift between two atomic states can be eliminated, resulting in the same transition frequency as atoms in free space. This has great significance for improving experimental repetition rate and reducing atomic decoherence in cold atom physics, quantum optics, and precision measurement. In this study, we calculate the dynamic polarizabilities of cesium 6S ground state and 7P excited state using the multi-level model for ODT, with laser wavelength ranging from 1200 to 2000 nm. The magic wavelengths for linearly and circularly polarized laser beams at the intersection of the dynamic polarizabilities of the two atomic states are obtained. Furthermore, we analyze the robustness of the magic trapping conditions and the feasibility of experimental operation near the telecom C-band wavelength.