expand_to_left_lbo()

bool syten::MPS::expand_to_left_lbo	(	Tensor< 3 > const &	right,
		Tensor< 4 > const &	op,
		LBOState &	target,
		Index const	position,
		SRDef const	alpha = 0.1,
		Index const	max_blocksize = 15,
		SRDef const	ratio = 1.,
		Index const	min_blocksize = 5
	)

Expands the LBO leftwards from site position.

Replaces the local LBO matrix by an identity if it did the expansion. In this case, returns true, otherwise, returns false.

References syten::MPS::LBOState::dropUnmatchedM(), syten::MPS::LBOState::dropUnmatchedV(), syten::MPS::LBOState::m(), and syten::underThreshold().

Referenced by syten::MPS::DMRG::LBOWorker::singleUpdate().

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