Quantum is the name of the terrorist organisation against which James Bond struggles. It could go: Un Quantum de réconfort although the French tittle of the film is Chaleur humaine.
That being said, 'quantum' is in physique the smallest measure. The main idea may be there is a small part/quantum of relief/reassurance/solace.
And to make it so common into French, I would say: Un peu de réconfort (as if you were in an evil world).
Not a teacher at all, by the way
Student or Learner