/
rbm_real.py
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/
rbm_real.py
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# Copyright 2018 The Simons Foundation, Inc. - All Rights Reserved.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# http://www.apache.org/licenses/LICENSE-2.0
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import netket as nk
# 1D Lattice
g = nk.graph.Hypercube(length=20, n_dim=1, pbc=True)
# Hilbert space of spins on the graph
hi = nk.hilbert.Spin(s=0.5, graph=g)
# Ising spin hamiltonian
ha = nk.operator.Ising(h=1.0, hilbert=hi)
# RBM Spin Machine
ma = nk.machine.RbmSpinReal(alpha=1, hilbert=hi)
ma.init_random_parameters(seed=1234, sigma=0.01)
# Metropolis Local Sampling
sa = nk.sampler.MetropolisLocal(machine=ma, n_chains=16, sweep_size=20)
# Optimizer
op = nk.optimizer.Sgd(learning_rate=0.1)
# Stochastic reconfiguration
gs = nk.variational.Vmc(
hamiltonian=ha,
sampler=sa,
optimizer=op,
n_samples=1000,
diag_shift=0.1,
method="Sr",
)
gs.run(output_prefix="test", n_iter=300)