Ideally, its secret key rate scales as the square root of the transmittivity of the optical channel, which is superior to QKD schemes based on direct transmission because key rates for the latter scale at best linearly with transmittivity.

Music does not claim that e.g. the position of all the orchestrae in the world, at the moment of your birth, somehow determines your personality, or that the movement of these orchestrae somehow determines events of your life.

Arnold, however, was a combustible character.

The musicians preluded on their instruments.