Semidefinite program to certify metrological usefulness from partial information. Official code of the work https://arxiv.org/abs/2306.12711.
Kindly refer to the article for a detailed analysis of the methods discussed and their advantages and disadvantages.
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We compare the different SDP methods in the Appendix A.3 of the paper and C.1 with Tóth's SDP method and the advantages and disadvantages of each of them in the SDP_comparison code file.
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We check the effect of a finite
$\delta\theta$ in our proposed SDP approach which can be seen in Finite_dtheta file. -
Using our SDP method in different examples such as One-axis twisting dynamics, Dicke-states, and spin chain systems.
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Finally, we have the Plots_data file to plot the figures for the one-axis twisting dynamics case with the data present in the Data folder, labelled as linearSS_10,30 and nonlinearSS_10,30 for system sizes from N = 10 to 30.
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We have rest of the data for the Dicke states analysis, spin-chain system, and comparison with the two proposed SDP methods in the Data.
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The plots used in the article can be found in the Plots.
In case of any queries, please write to us at guillem.muller@icfo.eu or anubhav.srivastava@icfo.eu.