sparsedm.py 文件源码

def apply_two_ptm(self, bit0, bit1, two_ptm):
        """Apply a two_bit_ptm between bit0 and bit1.
        """
        self.ensure_dense(bit0)
        self.ensure_dense(bit1)

        ptm0 = np.eye(4)
        if bit0 in self.single_ptms_to_do:
            for ptm2 in self.single_ptms_to_do[bit0]:
                ptm0 = ptm2.dot(ptm0)
            del self.single_ptms_to_do[bit0]

        ptm1 = np.eye(4)
        if bit1 in self.single_ptms_to_do:
            for ptm2 in self.single_ptms_to_do[bit1]:
                ptm1 = ptm2.dot(ptm1)
            del self.single_ptms_to_do[bit1]

        full_two_ptm = np.dot(two_ptm, np.kron(ptm1, ptm0))
        self.full_dm.apply_two_ptm(self.idx_in_full_dm[bit0], 
                self.idx_in_full_dm[bit1], full_two_ptm)