Dataset for noncentral collisions of two-dimensional logarithmic quantum droplets: momentum-controlled transition from capture to scattering.
Description
This dataset contains the diagnostic time series, summary tables, and figures supporting the manuscript “Noncentral collisions of two-dimensional logarithmic quantum droplets: momentum-controlled transition from capture to scattering.” The simulations solve a dimensionless logarithmic Gross--Pitaevskii equation using a split-step Fourier method. Base collision scans were performed for (k_0=0.25), (0.50), and (0.75), with impact parameters (b=0.0), (0.5), (1.0), (1.5), and (2.0). The data support a preliminary regime map showing quasi-elastic scattering, delayed separation, and a long-lived captured oscillatory state. A refined validation of the captured state at (k_0=0.25), (b=2.0) is included up to (t=80), using (L=48), (N_x=N_y=512), and (\Delta t=2.5\times10^{-4}).
Files
Steps to reproduce
1. Download and unzip the dataset archive. 2. Install the required Python packages: "numpy" and "matplotlib". 3. To inspect the diagnostic time series, open the ".dat" files located in: "data/diagnostics_k025/", "data/diagnostics_k050/", "data/diagnostics_k075/", and "data/diagnostics_refined_capture/". Each diagnostic file contains the columns: "step time energy norm dE dN Rrms R90 nmax xcm ycm Px Py Lz Lz_centered Lz_mask N_mask fragments". 4. To reproduce the preliminary collision-outcome map, use: "data/tables/regime_summary_k025_k050_k075.csv". 5. To reproduce the refined captured-state figure for (k_0=0.25), (b=2.0), (L=48), (N_x=N_y=512), and (\Delta t=2.5\times10^{-4}), use the diagnostics in: "data/diagnostics_refined_capture/". The combined-conservation diagnostic is: "k025_b2_L48_dt025_combined_t0_to_t80_diagnostics.dat". First generate the stationary droplet by imaginary-time propagation. Then run the collision scans for (k_0=0.25), (0.50), and (0.75). Finally, run the refined captured-state validation for (k_0=0.25), (b=2.0). 7. The main figures used in the manuscript are included in the "figures/" directory. The summary tables are included in "data/tables/". All quantities are dimensionless. The simulations solve a logarithmic Gross--Pitaevskii equation using a split-step Fourier method.