Function sequant::mbpt::op::S¶

Defined in File op.cpp

Function Documentation¶

ExprPtr sequant::mbpt::op::S(std::int64_t K, std::optional<std::wstring> grants_of = {})¶

makes generic particle-symmetric excitation (if K > 0) or deexcitation (if K < 0) operator of rank |K|

Parameters:: grants_of – if given, the operator label whose basis grants the legs carry