# netket.operator.boson.number#

netket.operator.boson.number(hilbert, site, dtype=<class 'float'>)[source]#

Builds the number operator $$\hat{a}^\dagger\hat{a}$$ acting on the site-th of the Hilbert space hilbert.

If hilbert is a non-Bosonic space of local dimension M, it is considered as a bosonic space of local dimension M.

Parameters
• hilbert (AbstractHilbert) – The hilbert space

• site (int) – the site on which this operator acts

• dtype (Any) –

Return type

LocalOperator

Returns

The resulting Local Operator