reformat

cirq-core/cirq/experiments/readout_confusion_matrix.py

@@ -317,17 +317,16 @@ def readout_mitigation_pauli_uncorrelated(
     ) -> tuple[float, float]:
         r"""Uncorrelated readout error mitigation for a multi-qubit Pauli operator.
 
-        This function
-        scalably performs readout error mitigation on an arbitrary-length Pauli operator. It is a
-        reimplementation of https://github.com/eliottrosenberg/correlated_SPAM but specialized to
-        the case in which readout is uncorrelated. We require that the confusion matrix is a
-        tensor product of single-qubit confusion matrices. We then invert the confusion matrix by
-        inverting each of the $C^{(q)}$ Then, in a bit-by-bit fashion, we apply the inverses of the
-        single-site confusion matrices to the bits of the measured bitstring, contract them with
-        the single-site Pauli operator, and take the product over all of the bits. This could be
-        generalized to tensor product spaces that are larger than single qubits, but the essential
-        simplification is that each tensor product space is small, so that none of the response
-        matrices is exponentially large.
+        This function scalably performs readout error mitigation on an arbitrary-length Pauli
+        operator. It is a reimplementation of https://github.com/eliottrosenberg/correlated_SPAM
+        but specialized to the case in which readout is uncorrelated. We require that the confusion
+        matrix is a tensor product of single-qubit confusion matrices. We then invert the confusion
+        matrix by inverting each of the $C^{(q)}$ Then, in a bit-by-bit fashion, we apply the
+        inverses of the single-site confusion matrices to the bits of the measured bitstring,
+        contract them with the single-site Pauli operator, and take the product over all of the bits.
+        This could be generalized to tensor product spaces that are larger than single qubits, but the
+        essential simplification is that each tensor product space is small, so that none of the
+        response matrices is exponentially large.
 
         This can result in mitigated Pauli operators that are not in the range [-1, 1], but if
         the readout error is indeed uncorrelated and well-characterized, then it should converge