netket.sampler.rules.HamiltonianRuleNumpyΒΆ

class netket.sampler.rules.HamiltonianRuleNumpy(operator)ΒΆ

Bases: netket.sampler.MetropolisRule

Rule for Numpy sampler backend proposing moves according to the terms in an operator.

In this case, the transition matrix is taken to be:

\[T( \mathbf{s} \rightarrow \mathbf{s}^\prime) = \frac{1}{\mathcal{N}(\mathbf{s})}\theta(|H_{\mathbf{s},\mathbf{s}^\prime}|),\]
Inheritance
Inheritance diagram of netket.sampler.rules.HamiltonianRuleNumpy
Methods
init_state(sampler, machine, params, key)[source]ΒΆ

Initialises the optional internal state of the Metropolis sampler transition rule.

The provided key is unique and does not need to be splitted.

It should return an immutable data structure.

Parameters
  • sampler – The Metropolis sampler.

  • machine – A Flax module with the forward pass of the log-pdf.

  • params – The PyTree of parameters of the model.

  • key – A Jax PRNGKey.

Returns

An optional state.

random_state(sampler, machine, parameters, state, key)ΒΆ

Generates a random state compatible with this rule.

By default this calls netket.hilbert.random.random_state().

Parameters
  • sampler (MetropolisSampler) – The Metropolis sampler.

  • machine (Module) – A Flax module with the forward pass of the log-pdf.

  • parameters (Any) – The PyTree of parameters of the model.

  • state (SamplerState) – The current state of the sampler. Should not modify it.

  • key (Any) – The PRNGKey to use to generate the random state.

replace(**updates)ΒΆ

β€œReturns a new object replacing the specified fields with new values.

reset(sampler, machine, params, sampler_state)ΒΆ

Resets the internal state of the Metropolis Sampler Transition Rule.

Parameters
  • sampler (MetropolisSampler) – The Metropolis sampler.

  • machine (Module) – A Flax module with the forward pass of the log-pdf.

  • params (Any) – The PyTree of parameters of the model.

  • sampler_state (SamplerState) – The current state of the sampler. Should not modify it.

Return type

Optional[Any]

Returns

A new, resetted, state of the rule. This returns the same type of sampler_state.rule_state() and might be None.

transition(sampler, machine, parameters, state, rng, Οƒ)[source]ΒΆ