標題: Nonequilibrium frequency-dependent noise through a quantum dot: A real-time functional renormalization group approach
作者: Moca, C. P.
Simon, P.
Chung, C. H.
Zarand, G.
電子物理學系
Department of Electrophysics
公開日期: 10-May-2011
摘要: We construct a real time current-conserving functional renormalization group (RG) scheme on the Keldysh contour to study frequency-dependent transport and noise through a quantum dot in the local moment regime. We find that the current vertex develops a nontrivial nonlocal structure in time that is governed by a new set of RG equations. Solving these RG equations, we compute the complete frequency and temperature dependence of the noise spectrum. For voltages that are large compared to the Kondo temperature (i.e., eV >> k(B)T(K)), two sharp antiresonances are found in the noise spectrum at frequencies h omega = +/- eV and, correspondingly, two Kondo-assisted peaks appear in the ac conductance through the dot.
URI: http://dx.doi.org/10.1103/PhysRevB.83.201303
http://hdl.handle.net/11536/8868
ISSN: 1098-0121
DOI: 10.1103/PhysRevB.83.201303
期刊: PHYSICAL REVIEW B
Volume: 83
Issue: 20
起始頁: 0
結束頁: 0
Appears in Collections:Articles


Files in This Item:

  1. a345c31b81c20d8c38c8caa6be5bdc22.pdf