Particle cross transfer

Particle and wave-packet duality lies in the heart of modern physics. A particle is a fermion or a boson. The electron is considered in this tutorial as a generic example of a fermion. Phonons represents the boson particle family. A phonon is a vibration quantum. Because of particle-wave duality, each particle can be described by a wave and each wave by a particle. The particle and the wave descriptions are complementary and equivalent, at least within the contents of this paper. rticle cross transfer effect avoids collisions between two identical particles travelling one towards the other by transferring them simultaneously from one incident guide to an output guide. This transfer leaves the propagation of all other incident particles contained in a given wave-length or energy window unperturbed. rresponding system can be conceived out of finite mono-mode wires. A mono-mode wire accommodates only one particle within its lateral dimensions. rticle cross effect opens perspectives for new, more compact and more efficient devices. This review displays the simplest possible examples of such a system.