Excitation of a Single Deterministic Atom to a Rydberg State via STIRAP with Chirped Pulses

We investigate the application of Stimulated Raman Adiabatic Passage (STIRAP) with chirped pulses for the excitation of a single, deterministic atom to a Rydberg state. We apply the STIRAP technique to a three-level ladder system and examine how pulse chirping improves spectral performance and reduces sensitivity to parameter variations. Numerical simulations demonstrate that the chirped STIRAP protocol preserves high-fidelity adiabatic population transfer to the Rydberg state under variations in two-photon detunings and pulse timings. These results inform the development of fast and robust gates for trapped ions, contributing to the scalability of trapped Rydberg ion architectures for quantum information processing.