Nonspreading relativistic electron wavepacket in a strong laser field
A solution of the Dirac equation in a strong laser field presenting a nonspreading wave packet in the rest frame of the electron is derived.It consists of a generalization of the self-accelerating free electron wavepacket [I.Kaminer et al., Nat.Phys.11, 261 (2015)1745-247310.1038/nphys3196] to the case with the background of a strong laser field.Bu