Data, benchmarks and code for: Design limits of cavity-mediated spin squeezing in a solid-state clock-transition ensemble (171Yb3+:CaWO4)

Raw simulation data, validation benchmarks, extracted numbers, figures and a frozen copy of the code (v1.1.0) for the article "Design limits of cavity-mediated spin squeezing in a solid-state clock-transition ensemble: a beyond-mean-field study of 171Yb3+:CaWO4" by T. M. Mahim, M. M. Rahman and A. S. M. Mohsin (BRAC University). The code implements a class-resolved second-order cumulant expansion in connected variables for cavity-mediated one-axis twisting of an inhomogeneously broadened spin ensemble, with collective emission, thermal cavity photons, single-spin dephasing, coupling inhomogeneity and pulse sequences (echo twist, Ramsey, twist-untwist readout). Contents: zenodo_data_and_benchmarks.zip (data/*.npz datasets for every figure, data/numbers.json with every number quoted in the paper, data/convergence.json, run logs, and all figures in PDF and PNG) and zenodo_code_frozen_v1.1.0.zip (the cavsqueeze Python package, test suite, and the scripts that regenerate every dataset and figure, including scripts/make_device_figure.py for the three-dimensional device schematic of Fig. 1). Version 1.1.0 differs from 1.0.0 only in the figures (Times New Roman font, legends placed outside the data area, new device schematic) and the figure scripts; the simulation code and all datasets are unchanged. The living repository is https://github.com/Tanvir-Mahmud-Mahim/yb-cawo4-cavity-squeezing (Apache-2.0). Dependencies: NumPy, SciPy, Matplotlib, QuTiP 5 (exact references only). Run scripts/run_all.sh, scripts/make_figures.py and scripts/make_device_figure.py to regenerate everything.