Optimization drivers

These modules perform optimization of iPEPS by one of the supported optimizers. In essence, they create appropriate closures from supplied loss function for both regular and line search steps and the invoke desired optimizer.

• ad_optim optimize with default PyTorch LBFGS optimizer

• optim.ad_optim_lbfgs_mod optimize with extended LBFGS optimizer supporting derivative-free backtracking linesearch

• optim.ad_optim_sgd_mod optimize with extended SGD optimizer supporting derivative-free backtracking linesearch