# Bosonic systems

```{toctree}
:maxdepth: 1

bose_hubbard_dimer
bose_hubbard_chain
spin_exchange
```

The examples cover number squeezing in a bosonic Josephson junction, coherence and density correlations in a unit-filled Bose-Hubbard ring, and a constrained Schwinger-boson representation of a spin-$1/2$ Heisenberg dimer.