Context:
According to a paper published in Science, it is possible to build a quantum computer whose information unit is sound/phonon
About Phonon:
A phonon is a definite discrete unit or quantum of vibrational mechanical energy, just as a photon is a quantum of electromagnetic or light energy.
Phonons and electrons are the two main types of elementary particles or excitations in solids.
Whereas electrons are responsible for the electrical properties of materials, phonons determine such things as the speed of sound within a material and how much heat it takes to change its temperature.