[Physics] matter wave and wave function

quantum mechanicswave-particle-dualitywavefunctionwaves

Is there any mathematical relationship between matter wave (or de Broglie wave) and wave function?

Also, does each type of particle (e.g. photon, electron, positron etc.) have its own unique wave function?

Best Answer

A de Broglie or matter wave pretty much is the same as the wave function. Recognizing that particles had wavelengths (based on momentum) was his de Broglie's great insight.

As to each particle having its own wave function, I'd suggest thinking of it this way:

If you can characterize the momentum of particles, you will find that particles with identical momentum have the same wavelengths as they move through open space. Similarly, if unmoving particles have identical rest masses, they will have the same quantum frequencies (detectable through interference effects) as they move through time. In that sense, the wave functions of all particles share certain common features that are related directly to their momenta and rest masses.

However, it is other conserved quantities such as spin (especially spin!) and charge that give each type of particle wave function its real uniqueness in how it interacts with other particles over time. For more mathematical depth, quantum field theory provides a way to model particles as "excitations" or vibrations in fields that are associated with each unique particle type.