Entropy Carried by the Torsion Spin Fluid at the Density Limit

The unpolarised spin fluid carries an entropy density comparable to the radiation value at the same temperature, so the matter sector is not a negligible appendix to the radiation ledger at the bounce, whatever is true at late times. Polarisation, which coherent torsion scenarios require, carries a definite per-particle entropy price that must be paid by whatever aligns the spins. The computation is performed from stated assumptions in a density-limited bounce, in which the neutron-branch limit density sets a maximum density, a finite bounce temperature, and a minimum horizon size. Headline values from the deposited calculation are: n_per_m3 = 5.80e+84; T_bounce_K = 3.28e+22; E_F_eV = 6.40e+34; kBT_over_EF = 4.41e-17; s_unpolarised_per_particle_kB = 2.18e-16; polarisation_deficit_per_particle_kB = 0.693; s_density_unpol_kB_m3 = 1.26e+69. The study is simulated and computed, not measured, and its conclusions are stated at the precision the stated assumptions support.