Quantum capacitance

Quantum capacitance is a concept in condensed matter physics and nanotechnology that describes the capacitance associated with the density of states of a material at the quantum level. It is particularly relevant in systems where the electronic states are quantized, such as in quantum dots, two-dimensional electron gases, and other nanostructures. In classical capacitance, the capacitance (\(C\)) is defined as the ability of a system to store charge per unit potential difference.