Abstract
In a laser beam, the momentum carried by light is locally affected by spacial
intensity and phase fluctuations. In this letter, we show that fluctuations of
the momentum is correlated to intensity fluctuations of the beam. We propose a
model to estimate the contribution of short-scale distortions to the local
photon momentum. We experimentally measure this contribution by using an atom
interferometer. We also discuss how such effects, which have always been
neglected, impact high-precision measurements based on atom interferometry.
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