Impact of Laser Noise on Gate Fidelity in Rydberg Atom Quantum Computing Systems

Arrays of single neutral Rydberg atoms are a promising platform for quantum computing, offering scalability and high-fidelity quantum gates [1]. However, noise from the laser sources in the form of intensity and phase fluctuations can limit gate fidelity. We present a tool to evaluate whether a given laser source can meet specific gate or sequence fidelity requirements under real experimental conditions. Our approach involves calculating the impact of intensity and phase noise on gate fidelity. We achieve this using a comprehensive experimental system model, incorporating optimized and non-optimized pulse sequences and a noise library. The library provides functionalities to sample stochastic processes that statistically converge in the probability to those yielding the experimentally measured power spectral density. The resulting analysis provides valuable insights, enabling informed experimental design at an early stage.

[1] Harry Levine,et al. Phys. Rev. Lett. 121, 123603, 2018