By introducing concepts of beam shaping into quantum mechanics, we show how
interference effects of the quantum wavefunction describing multiple electrons can exactly
balance the repulsion among the electrons. With proper shaping of the fermionic
wavefunction, we propose non-diffracting quantum wavepackets of multiple electrons that
can also carry orbital angular momentum, in the form of multi-electron nondiffracting vortex
beams. The wavefunction is designed to compensate for both the repulsion between …

The wave-like nature of electrons has been known for almost a century, but only in recent
years has the ability to shape the wavefunction of EBeams (Electron-Beams) become
experimentally accessible. Various EBeam wavefunctions have been demonstrated, such as
vortex, self-accelerating, Bessel EBeams etc. However, none has attempted to manipulate
multi-electron beams, because the repulsion between electrons rapidly alters the beam
shape. Here, we show how interference effects of the quantum wavefunction describing …