Fix small issues

qiskit_device_benchmarking/bench_code/mrb/mirror_qa.py

@@ -12,18 +12,18 @@
 """
 Mirror QA Experiment class.
 """
 from typing import Union, Iterable, Optional, List, Sequence
 import itertools
 import numpy as np
 from numpy import pi
 from numpy.random import Generator, BitGenerator, SeedSequence
 from scipy.stats import entropy
 from uncertainties import unumpy as unp
 from scipy.spatial.distance import hamming
 
 from qiskit.circuit import Instruction
 from qiskit.providers.backend import Backend
 from qiskit.circuit.library import CXGate
 
 from qiskit_experiments.framework import ExperimentData
 from qiskit_experiments.data_processing import DataProcessor
@@ -77,15 +77,13 @@
         pauli_randomize: bool = True,
         sampling_algorithm: str = "edge_grab",
         two_qubit_gate_density: float = 0.25,
-        two_qubit_gate: Instruction = CXGate(),
         num_samples: int = 3,
         sampler_opts: Optional[dict] = {},
         backend: Optional[Backend] = None,
         seed: Optional[Union[int, SeedSequence, BitGenerator, Generator]] = None,
         inverting_pauli_layer: bool = False,
         initial_entangling_angle: float = pi/2,
         final_entangling_angle: float = 0,
-        analyzed_quantity: str = "Effective Polarization",
     ):
         """Initialize a mirror quantum awesomeness experiment.
 
@@ -94,8 +92,6 @@
             lengths: A list of RB sequences lengths.
             sampling_algorithm: The sampling algorithm to use for generating
                 circuit layers. Defaults to "edge_grab" which uses :class:`.EdgeGrabSampler`.
-            start_end_clifford: If True, begin the circuit with uniformly random 1-qubit
-                Cliffords and end the circuit with their inverses.
             pauli_randomize: If True, surround each sampled circuit layer with layers of
                 uniformly random 1-qubit Paulis.
             two_qubit_gate_density: Expected proportion of qubit sites with two-qubit
@@ -128,13 +124,13 @@
             backend=backend,
             pauli_randomize=pauli_randomize,
             sampling_algorithm=sampling_algorithm,
+            start_end_clifford=False,
             two_qubit_gate_density=two_qubit_gate_density,
             num_samples=num_samples,
             sampler_opts=sampler_opts,
             seed=seed,
             inverting_pauli_layer=inverting_pauli_layer,
             full_sampling=False,
-            start_end_clifford=False,
             initial_entangling_angle = initial_entangling_angle,
             final_entangling_angle = final_entangling_angle,
         )

qiskit_device_benchmarking/bench_code/mrb/mirror_rb_analysis.py

@@ -267,7 +267,7 @@ def __init__(
         self._analyzed_quantity = analyzed_quantity
         self._target_bs = target_bs
 
-    def _rewrite_string(string, index):
+    def _rewrite_string(self, string, index):
         '''Returns string unchanged. Will be overwritten for Mirror QA'''
         return string