Addressable Rydberg excitation in arrays of single neutral atoms with a strongly focused flat-top beam

• URL: http://arxiv.org/abs/2604.26580v1
• Date: Wed, 29 Apr 2026 12:00:52 GMT
• Title: Addressable Rydberg excitation in arrays of single neutral atoms with a strongly focused flat-top beam
• Abstract summary: We present a method for generating a laser beam with flat intensity and phase profiles in the focal region.<n>We synthesize the beam as a superposition of Hermite--Gaussian or Laguerre--Gaussian modes.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We present a method for generating a laser beam with flat intensity and phase profiles in the focal region where the beam interacts with neutral $^{87}$Rb atoms in an array of optical dipole traps. We synthesize the beam as a superposition of Hermite--Gaussian or Laguerre--Gaussian modes. Then we give analytical expressions for the coefficients of such a superposition, an analysis of beam propagation along the $z$ axis in the vicinity of the waist, and several other related theoretical issues. Rydberg two-qubit dynamics driven by this flat-top profile are analyzed through numerical solutions of the Lindblad master equation using our in-house Julia package. Beam preparation is demonstrated on a neutral-atom experimental platform. Measurements reveal a difference in the visibility of Rabi oscillations for addressed atoms compared with neighboring ones, confirming the effective spatial selectivity provided by the flat-top beam profile.

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