Abstract: The marginal distribution of Winger function in mesoscopic LC circuit at a finite temperature is in- vestigated by means of the Wigner function. The results show that the marginal distributions statistical average for p^2/2L and q^2/2C of the Wigner function are exactly the energy stored in inductance and capacity of the mesoscopic LC circuit, respectively at finite temperature.

Key words: Wigner function, marginal distribution, application, mesoscopic LC circuit