apply_op_itrunc() [1/2]

SRDef syten::MPS::apply_op_itrunc	(	LBOState &	a,
		Operator const &	op,
		Truncation const &	trunc,
		bool const	relax = true,
		bool const	final_rightnorm = true
	)

Applies the operator op to the state a using a variant of the zip-up algorithm by Stoudenmire et. al.

If relax is true, relaxes truncation criteria during the initial zip-up. If final_rightnorm is false, does not do a final right-normalisation of the state.

References syten::MPS::LBOState::dropUnmatched(), syten::Basis::flipped(), syten::genCombinator(), syten::genFuse(), syten::Tensor< rank >::getBasis(), syten::MPS::LBOState::m(), syten::Truncation::maxBlocksize, syten::Truncation::maxStates, syten::MPS::LBOState::rightnorm(), syten::MPS::LBOState::size(), SYTEN_ASSERT_DEBUG, syten::Truncation::threshold, and syten::MPS::LBOState::v().

Referenced by apply_op_itrunc_fit(), syten::do_apply_op(), syten::MPS::TEBD::doTEBD_serial(), syten::MPS::TDVP::Worker::gse_build_krylov_vectors(), syten::MPS::DMRG::Worker::gse_build_krylov_vectors(), and syten::Krylov::OperatorWrapper< Op >::operator()().

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