# Quantum fluctuations and momentum

The Lamb shift showed that quantum fluctuations could have a real, measurable effect on the orbits of electrons. Since these fluctuations can impact the momentum of mass, is it possible that quantum fluctuations could impact electro-magnetic momentum, such as the momentum of photons?

For example, given a cubic volume of space, suppose a photon has an initial momentum h/λ (initial) as it enters perpendicular to the plane of one face of the cubic space. If the photon travels through the space, statistically the electron should have a certain number of collisions with the quantum virtual particles within this space before it reaches the opposite face, and would this not decrease the initial momentum of the photon, such that h/λ (final) < h/λ (initial)?