Data for article Decoherence-free radiofrequency dressed subspaces

Data taken at Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, Heraklion 70013, Greece. This data is presented in the figures of the paper "Decoherence-free radiofrequency dressed subspaces" in Physical Review A (2021). Abstract of paper to which this data belongs: We study the spectral signatures and coherence properties of radiofrequency dressed hyperfine Zeeman sub-levels of 87Rb. Experimentally, we engineer combinations of static and RF magnetic fields to modify the response of the atomic spin states to environmental magnetic field noise. We demonstrate analytically and experimentally the existence of "magic" dressing conditions where decoherence due to electromagnetic field noise is strongly suppressed. Building upon this result, we propose a bi-chromatic dressing configuration that reduces the global sensitivity of the atomic ground states to low-frequency noise, and enables the simultaneous protection of multiple transitions between the two ground hyperfine manifolds of atomic alkali species. Our methods produce protected transitions between any pair of hyperfine sub-levels at arbitrary (low) DC-magnetic fields. File: Decoherence-free_radio-frequency-dressed_subspaces_fig2_allsets.csv. Data for FIG. 2 - The Detuning of the resonant frequencies of the transitions between the dressed states (a) |1, −1> → |2, 2>, (b) |1, −1> →|2, 1>, and (c) |1, −1> → |2, 0>. Shown as functions of the applied static magnetic field. File: Decoherence-free_radio-frequency-dressed_subspaces_fig3_allsets.csv. Data for FIG. 3 - Data for the fraction of measured population in F = 2 as a function of the microwave detuning ωMW − ω0 for three magnetic fields: Bdc = 3.195 G, Bdc = 3.247 G, and Bdc = 3.216 G. File: Decoherence-free_radio-frequency-dressed_subspaces_fig4a_allsets.csv. Data for FIG. 4a - the line shift for the |1, m-bar = −1> → |2, m-bar = 1> transition as a function of the static magnetic field. File: Decoherence-free_radio-frequency-dressed_subspaces_fig4b_allsets.csv. Data for FIG4b - the population of the upper hyperfine manifold as a function of the Ramsey time for two DC magnetic fields: Bdc = 2.87 G and Bdc = 2.56 G.