Extended Data Fig. 4: Generating homogeneous Rydberg beams.
From: Quantum phases of matter on a 256-atom programmable quantum simulator
a, Measured Gaussian-beam illumination on the SLM for shaping the 420-nm Rydberg beam. A Gaussian fit to these data is used as an input for the hologram optimization algorithm. b, Measured wavefront error through our optical system (after correction), showing a reduction of aberrations to λ/100. c, Computer-generated hologram for creating the 420-nm top-hat beam. d, Measured light intensity of the 420-nm top-hat beam (top), and the cross-section along where atoms will be positioned (bottom). Vertical lines denote the 105-μm region where the beam should be flat. e, Using the measured top-hat intensity, a phase correction is calculated for adding to the initial hologram. f, Resulting top-hat beam after feedback shows considerably improved homogeneity. pk–pk, peak to peak.
