quara.objects.composite_system module¶

class CompositeSystem(systems)[source]¶

Bases: object

Class for describing Composite system

Constructor

Parameters

systems (List[ElementalSystem]) – list of ElementalSystem of this CompositeSystem.

Raises

ValueError – duplicate ElementalSystem instance.
ValueError – duplicate ElementalSystem name.

basis()[source]¶

returns MatrixBasis of CompositeSystem.

Returns: MatrixBasis of CompositeSystem.
Return type: MatrixBasis

comp_basis()[source]¶

returns computational basis of CompositeSystem.

Returns: computational basis of CompositeSystem.
Return type: MatrixBasis

property dim: int¶

returns dim of CompositeSystem.

the dim of CompositeSystem equals the dim of basis.

Returns: dim of CompositeSystem.
Return type: int

dim_e_sys(i)[source]¶

returns the dimension of the i-th ElementalSystem.

the dim of the i-th ElementalSystem.

Parameters: i (int) – the id of an ElementalSystem
Returns: the dim of the i-th ElementalSystem
Return type: int

property elemental_systems: Tuple[quara.objects.elemental_system.ElementalSystem]¶

returns list of ElementalSystem of this CompositeSystem.

Returns: list of ElementalSystem of this CompositeSystem.
Return type: Tuple[ElementalSystem]

get_basis(index)[source]¶

returns basis specified by index.

Parameters

index (Union[int, Tuple]) – index of basis. if type is int, then regardes it as the index after calculating the basis of CompositeSystem. if type is Tuple, then regardes it as the indices of the basis of ElementalSystems.

Returns

basis specified by index.

Return type

MatrixBasis

Raises

ValueError – length of tuple does not equal length of the list of the basis.
IndexError – specified index does not exist in the list of the basis.

property is_basis_hermitian: bool¶

property is_orthonormal_hermitian_0thprop_identity: bool¶

returns whether all ElementalSystem of this CompositeSystem are orthonormal, hermitian and 0th prop identity.

Returns: whether all ElementalSystem of this CompositeSystem are orthonormal, hermitian and 0th prop identity.
Return type: bool

property num_e_sys: int¶

returns the number of ElementalSystem.

the number of ElementalSystem.

Returns: num of ElementalSystem.
Return type: int