qit.utils.lrmul

qit.utils.lrmul(L, R)

Superoperator equivalent for multiplying both from left and right.

$$L\rho R=\text{inv\_vec}(\text{lrmul}(L,R)\text{vec}(\rho ))$$

Parameters

• L (array) – matrix, shape (m, p)

• R (array) – matrix, shape (q, r)

Returns

superoperator that implements left multiplication by the matrix L and right

multiplication by the matrix R of a vectorized matrix $\rho$

Return type

array