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Nonlinear optical effects in vacuum have been investigated as a means toverify quantum electrodynamics in a region of low photon energy. By consideringnonlinear electromagnetic waves in a three-dimensional cylindrical cavity, wereport that the orbital angular momentum of light strongly affectsself-modulations in a long timescale. The variation in optical phase is shownto enhance the vacuum nonlinearity. Moreover, we demonstrate the time evolutionof the energy transfer between cavity modes and of the phase shift, paving newpossibility for verification experiments.

Self-modulation of nonlinear light in vacuum enhanced by orbital angular momentum