syten::MPS::ParseOperator Namespace Reference

Support classes and functions related to matrix product operator parsing. More...

Classes
class	InvalidExpression
	Thrown when an invalid expression is encountered during MPS::Operator parsing. More...
class	NotDefinition
	Thrown when parse() gets a string that is not an operator definition of the form A:O More...
struct	StackElement
	One element of the parsing stack. More...

Typedefs
typedef void(*	StackElementParser) (std::stack< StackElement > &stack, Lattice const &lat, Index const position, bool const truncate)
	Type of a function parsing one element of the supplied stack assuming the supplied lattice. More...

Enumerations
enum class	StackElementType { String , Sector , Number , Operator }
	Denotes the type of element stored on the stack. More...

Functions
StackElementParser	getFunction (std::string const &token)
	Return the function matching the token specified. More...
Functions implementing operations on the parsing stack
void	operatorF (std::stack< StackElement > &s, Lattice const &lat, Index const position, bool const truncate)
	Create a global operator from the topmost element: x_str|x_num|x_opr _o → x_opr More...
void	siteF (std::stack< StackElement > &s, Lattice const &lat, Index const position, bool const truncate)
	Create a single-site operator from the two topmost elements: a_str b_num _s → opr(a_b) More...
void	sectorF (std::stack< StackElement > &s, Lattice const &lat, Index const position, bool const truncate)
	Create a sector from the topmost element: x_str → x_sec More...
void	multF (std::stack< StackElement > &s, Lattice const &lat, Index const position, bool const truncate)
	Multiply the two topmost elements: a_opr|a_num b_opr|b_num → a * b, a is applied first. More...
void	dotqF (std::stack< StackElement > &s, Lattice const &lat, Index const position, bool const truncate)
	Scalar product of two operators in the specified quantum number sector: a_opr b_opr q_sec → dot(a,b,q) More...
void	dotF (std::stack< StackElement > &s, Lattice const &lat, Index const position, bool const truncate)
	Scalar product of two operators in the vacuum quantum number sector: a_opr b_opr _dot → dot(a,b), calls dotqF() if top of stack is sector. More...
void	addF (std::stack< StackElement > &s, Lattice const &lat, Index const position, bool const truncate)
	Addition of two operators or two numbers: a_num b_num → a+b | a_opr b_opr → a+b More...
void	distributeF (std::stack< StackElement > &s, Lattice const &lat, Index const position, bool const truncate)
	Distributes the absolute value of a number evenly over the system size, multiplied into the identity operator. More...
void	truncateF (std::stack< StackElement > &s, Lattice const &lat, Index const position, bool const truncate)
	Truncation of an operator. More...
void	dot_squareF (std::stack< StackElement > &s, Lattice const &lat, Index const position, bool const truncate)
	Squares an operator using dot(). More...
void	mult_squareF (std::stack< StackElement > &s, Lattice const &lat, Index const position, bool const truncate)
	Squares an operator using operator*. More...
void	equiscaleF (std::stack< StackElement > &s, Lattice const &lat, Index const position, bool const)
	Calls equiscale() on a MPO. More...

Detailed Description

Support classes and functions related to matrix product operator parsing.