def get_initial_simplex_and_names(
        self, initial_simplex_step_size: float = 0.1
    ) -> tuple[np.ndarray, list[str]]:
        """Return an initial Nelder-Mead simplex and the names for each parameter."""
Return an initial Nelder-Mead simplex and the names for each parameter.
cirq-core/cirq/experiments/xeb_fitting.py