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    Area of Science:

    • Quantum physics
    • Atomic physics
    • Sensing technology

    Background:

    • Rydberg atoms are used for precise electric field measurements.
    • Existing models often neglect crucial Rydberg-Rydberg interactions.
    • Single-particle models limit the accuracy of quantum sensing simulations.

    Purpose of the Study:

    • To develop a computational method that includes Rydberg-Rydberg interactions.
    • To improve the accuracy of electric field measurements using Rydberg atoms.
    • To provide a more predictive model for quantum sensing applications.

    Main Methods:

    • Incorporated Rydberg-Rydberg interaction terms into four-level optical Bloch equations.
    • Developed an efficient steady-state solution method, avoiding large matrix computations.
    • Applied Doppler frequency shift to individual atoms and simulated up to 7000 atoms.

    Main Results:

    • The many-body model accurately simulates Rydberg-Rydberg interactions across various atomic densities.
    • Model predictions show a 4.59% error compared to experimental data.
    • The many-body model demonstrates superior prediction of the linear range for electric field measurements.

    Conclusions:

    • The developed many-body model offers a significant advancement for Rydberg atom-based quantum sensing.
    • This model enhances the precision and applicability of electric field measurements.
    • The findings pave the way for more robust and accurate quantum sensing technologies.