Quantum capacitance
Quantum capacitance, also known as chemical capacitance is defined as the variation of electrical charge q {\displaystyle q} with respect to the variation of internal chemical potential μ {\displaystyle \mu } , i.e., C q = d q d μ {\displaystyle C_{q}={\frac {dq}{d\mu }}} . It was first introduced theoretically by Serge Luryi (1988).