Finite frequency quantum noise in an interacting mesoscopic conductor.
We present a quantum calculation based on scattering theory of the frequency-dependent noise of current in an interacting chaotic cavity. We include interactions of the electron system via long range Coulomb forces between the conductor and a gate with capacitance C. We obtain explicit results exhibiting the two time scales of the problem, the cavity's dwell time tau(D) and the RC time tau(C) of the cavity in relation to the gate. The noise shows peculiarities at frequencies of the order and exceeding the inverse charge relaxation time tau(-1) = tau(D)(-1) + tau(C)(-1).
Laboratoire de Physique et Modélisation des Milieux Condensés, CNRS & Université Joseph Fourier, Boîte Postale 166, 38042 Grenoble-cedex 9, France.
F W J
FW
Hekking
J P
JP
Pekola