Data pertaining to the publication: Crosstalk in Multi-Qubit Fluxonium Architectures with Transmon Couplers

Numerical data pertaining to the work "Crosstalk in Multi-Qubit Fluxonium Architectures with Transmon Couplers". The dataset consists of two parts:<br>The numerically computed quantum states are stored in the folder 'states/'. The states computed for each parameter regime and system are stored in an individual folder, which are named through the naming convention 'states-{system}-{parameter regime}/'. Each state is then stored in its individual subfolder. Here, the folder names simply indicate the state that it contains. In most of these subfolders, the actual states are stored inside the folder '0/'. However, in some cases an adiabatic ramp was used (as explained in Appendix B of the manuscript), and in those cases there are multiple numbered folders inside these subfolders (i.e. '0/', '1/', '2/'). These folders then correspond to the adiabatic steps taken by the solver. These final folders actually contain the states, and consists of several numbered '{i}.npy' files which contain the optimized state for site i in the matrix-product state for those simulations.The results of the time evolutions are stored in the folder 'timedomain/'. Each of the folder names describes the specific parameters that the time evolution was computed for using the same naming convention as for the states. Each of these folders contain several '.npy' files that contain the actual results. The files 'V0.npy', 'ppps.npy', 'etas.npy' and 'detunings.npy' contain the optimized pulse parameters. The files 'conditional_phase.npy' and 'leakage.npy' contain the results for the conditional phase and leakage for the calibrated operation with all spectators in |0&gt;. The files 'conditional_phase1.npy' and 'leakage1.npy' contain the results for the conditional phase and leakage for all other spectator configurations. <br>All numerical data was generated and analyzed using Python. The code used can be found through the link mentioned in the 'Data Availability' section in the manuscript.