sc::FermionBasicNCOper< Nb, FString > Class Template Reference

basic Nb-body number-conserving (nc) operator in sp representation More...

#include <chemistry/qc/nbody/string.h>

Public Types
typedef FString::state_index_type	state_index_type

Public Member Functions
template<typename Int >
	FermionBasicNCOper (const std::array< Int, Rank > &t, const std::array< Int, Rank > &f)
const std::array< state_index_type, Rank > &	cre () const
	reports the states in which particles are created More...
const std::array< state_index_type, Rank > &	ann () const
	reports the states in which particles are annihilated More...
void	apply (FString &os) const
	applies this operator to_ FermionOccupationNBitString os. More...
bool	apply_sign (FString &os) const
	same as apply(), but returns whether application operator changes the sign of the state; the sign changes if the number of occupied states "crossed" by the operator is odd More...
std::pair< bool, FString >	operator() (const FString &os) const
	similar to_ apply_sign(), but keeps the argument unchanged More...

Static Public Attributes
static const size_t	Rank = Nb

Detailed Description

template<size_t Nb, typename FString>
class sc::FermionBasicNCOper< Nb, FString >

basic Nb-body number-conserving (nc) operator in sp representation

Template Parameters

Nb	rank of the operator (number of particles that possibly change states)

Member Function Documentation

ann()

template<size_t Nb, typename FString>

const std::array<state_index_type,Rank>& sc::FermionBasicNCOper< Nb, FString >::ann ( ) const

inline

reports the states in which particles are annihilated

Returns

the states in which particles are annihilated

apply()

template<size_t Nb, typename FString>

void sc::FermionBasicNCOper< Nb, FString >::apply ( FString &  os ) const

inline

applies this operator to_ FermionOccupationNBitString os.

Unsafe, but fast.

Parameters

os	the FermionOccupationNBitString object

Returns

FermionOccupationNBitString obtained by removing a particle from_ from_ and adding a particle to_ to_.

apply_sign()

template<size_t Nb, typename FString>

bool sc::FermionBasicNCOper< Nb, FString >::apply_sign ( FString &  os ) const

inline

same as apply(), but returns whether application operator changes the sign of the state; the sign changes if the number of occupied states "crossed" by the operator is odd

Parameters

os	the FermionOccupationNBitString object

Returns

true is the sign of the state changes

Referenced by sc::FermionBasicNCOper< 1, FString >::operator()(), and sc::FermionBasicNCOper< Rank, FString >::operator()().

cre()

template<size_t Nb, typename FString>

const std::array<state_index_type,Rank>& sc::FermionBasicNCOper< Nb, FString >::cre ( ) const

inline

reports the states in which particles are created

Returns

the states in which particles are created

operator()()

template<size_t Nb, typename FString>

std::pair<bool,FString > sc::FermionBasicNCOper< Nb, FString >::operator() ( const FString &  os ) const

inline

similar to_ apply_sign(), but keeps the argument unchanged

Parameters

os	the FermionOccupationNBitString object

Returns

new pair[sign_change,FermionOccupationNBitString]

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The documentation for this class was generated from the following file:

• src/lib/chemistry/qc/nbody/string.h