energy() [1/2]

SRDef syten::BTT::DMRG::Run::energy	(	Operator::Ptr	optr,
		State::Ptr	pptr,
		Ctrs::Ptr	cptr
	)

Calculates the energy on the specified node, assuming that all neighbouring contractions exist and point in the correct direction.

References syten::BTT::Operator::aIdx, syten::BTT::State::aIdx, syten::BTT::State::aInt, syten::BTT::Operator::bIdx, syten::BTT::State::bIdx, syten::BTT::State::bInt, syten::BTT::Operator::dIdx, syten::BTT::State::pIdx, syten::BTT::State::pInt, syten::real(), syten::BTT::Operator::rIdx, syten::BTT::State::rIdx, syten::BTT::State::rInt, and syten::BTT::Operator::uIdx.

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