Parametric Resonance in the Expanding Branch After a Bounce

On a cosmological bounce background with a single minimum of the scale factor and unit duration, in units set by that duration, the quantities reported here are obtained by direct numerical evolution of the field modes from the contracting branch to the expanding branch. The largest growth exponent found is 0.1339, at wavenumber 0.90. The far off-band mode at wavenumber 3 has exponent 0.0000, consistent with no growth, while the longest mode computed has exponent -0.0008. The calculation is performed on a stated model background with stated vacuum conventions, and the code and full-precision output are deposited with the paper. This study is simulated and computed from those assumptions; it is not a measurement.