"""Physical constants used by the smearing utilities.

CODATA 2018 / SI exact values. Imported through the package
namespace; kept in their own module so unit conversions and
flavor implementations share a single source of truth.
"""

from __future__ import annotations


KB_HARTREE_PER_K = 3.166811563455557e-6
EV_PER_HARTREE = 27.211386245988
HARTREE_PER_RYDBERG = 0.5