mm.physics.fock.apply_choi_to_ket

mrmustard.physics.fock.apply_choi_to_ket(choi, ket, choi_in_modes, choi_out_modes=None)

Applies a choi operator to a ket. It assumes that the ket is indexed as left_1, …, left_n.

The choi operator has indices that contract with the ket (choi_in_modes) and indices that are left over (choi_out_modes). choi will contract choi_in_modes from the left and from the right with the ket.

Parameters:

• choi (array) – the choi operator to be applied

• ket (array) – the ket to which the choi operator is applied

• choi_in_modes (list of ints) – the indices of the choi operator that contract with the ket

• choi_out_modes (list of ints) – the indices of the choi operator that re leftover

Returns:

the resulting ket

Return type:

array

code/api/mrmustard.physics.fock.apply_choi_to_ket

 

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