COULOMB-BLOCKADE OSCILLATIONS OF CONDUCTANCE IN THE REGIME OF STRONG TUNNELING

We study the transport through a quantum dot coupled to two leads by s ingle-mode point contacts. The linear conductance is calculated analyt ically as a function of gate voltage and temperature T in the case whe n transmission coefficients of the contacts are close to unity. As a f unction of the gate voltage, the conductance shows Coulomb blockade os cillations. At low temperatures, the off-resonance conductance vanishe s as T-2, in agreement with the theory of inelastic cotunneling. Near a resonance, the low-energy physics is governed by a multichannel Kond o fixed point.