👉 Unshells, also known as quantum wells or quantum holes, are a type of quantum system that is composed of two layers of electrons. The outer layer (the "shell") contains more electrons than the inner layer (the "valence shell"). This allows electrons to occupy different energy levels within the same quantum state. These states can be classified into two main categories: valence shells and conduction shells. Valence shells are those with a full electron configuration, while conduction shells have a