energyM()

std::pair< SRDef, SRDef > syten::MPS::DMRG::LBOWorker::energyM	(	Index const	i,
		std::vector< Tensor< 4 > > const &	trans_ops
	)

Return the energy estimate from the specific site.

The first value is the calculation only for the first MPO, the second value is the sum for all MPOs.

Parameters

i	site index
trans_ops	LBO-transformed operator components

Requires the left- and right contractions to the left/right of that site to exist.

References contrLeft, contrRight, syten::MPS::Operator::dIdx, length, syten::MPS::LBOState::lIdx, syten::MPS::Operator::lIdx, syten::MPS::LBOState::m(), psi, syten::MPS::LBOState::rIdx, syten::MPS::Operator::rIdx, SYTEN_ASSERT_DEBUG, syten::MPS::LBOState::uIdx, and syten::MPS::Operator::uIdx.

Referenced by LBOWorker().

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