  The Spinsim python package simulates spin-half and spin-one quantum
mechanical systems following a time dependent Shroedinger equation. It makes
use of numba.cuda, which is an LLVM (Low Level Virtual Machine) compiler for
Nvidia Cuda compatible systems using GPU parallelization. Along with other
optimizations, this allows for speed improvements from 3 to 4 orders of
magnitude while staying just as accurate, compared to industry standard
packages. It is available for installation on PyPI, and the source code is
available on github. The initial use-case for the Spinsim will be to simulate
quantum sensing-based ultracold atom experiments for the Monash University
School of Physics \& Astronomy spinor Bose-Einstein condensate (spinor BEC)
lab, but we anticipate it will be useful in simulating any range of spin-half
or spin-one quantum systems with time dependent Hamiltonians that cannot be
solved analytically. These appear in the fields of nuclear magnetic resonance
(NMR), nuclear quadrupole resonance (NQR) and magnetic resonance imaging (MRI)
experiments and quantum sensing, and with the spin-one systems of nitrogen
vacancy centres (NVCs), ultracold atoms, and BECs.
