SyTen

◆ variance() [1/2]

template<typename S >
std::pair< SDef, SRDef > syten::MPS::variance ( S &&  a,
Operator const &  op,
S &&  b,
SDef  norm = NAN 
)

Calculates the expectation value and the variance.

References syten::abs(), expectation(), std::isnan(), norm(), overlap(), and sqaure_expectation().

Referenced by syten::calc_expval(), syten::do_expval(), and variance().

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