Nonperturbative calculation of Coulomb blockade in a small tunnel junction
A non-perturbative calculation is performed for Coulomb blockade in a small tunnel junction, by use of the closed-time-path Green's function and Odintsov's polaron formulation. Self consistent forms for the current-voltage (I-V) characteristics, the damping function, the fluctuation function, and the non-equilibrium Bose distribution function, are presented. At T=0 and in the weak dissipation limit, analytic results are obtained. In particular, we demonstrate that the widely used ωic approximation (tunneling impedance Z(ω)=RT) for the effect of dissipation on Coulomb blockade, is satisfactory in the range of RT∼Rk to 10Rk (Rk=25.8 kω). © 1994.
Publication Source (Journal or Book title)
Physica B: Physics of Condensed Matter
Hu, G., O'Connell, R., & Cai, J. (1994). Nonperturbative calculation of Coulomb blockade in a small tunnel junction. Physica B: Physics of Condensed Matter, 194-196 (PART 1), 1023-1024. https://doi.org/10.1016/0921-4526(94)90841-9