2008/05/20 by T. Hecht, Theresa Hecht, Andreas Weichselbaum +2 · 14 citations
Computer Science · Physics and Astronomy · #Amplitude #Computer science #Condensed matter physics #Impurity #Kondo effect #Mesoscopic physics #Physics #Quantum #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #Semiconductor Quantum Structures and Devices #Telecommunications #Transmission (telecommunications) #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.80.115330
published in Physical Review B 80(11) (American Physical Society) · 10 pages, 4 figures
arxiv created 2008/05/20 · openalex publication_date 2009/09/29 · arxiv updated 2013/05/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The magnitude and phase of the transmission amplitude of a multilevel quantum dot is calculated for the mesoscopic regime of level spacing large compared to level width. The interplay between Kondo correlations and the influence by neighboring levels is discussed. As in the single-level case, the Kondo plateaus of magnitude and phase disappear with increasing temperature. At certain gate voltages, ``stationary'' points are found at which the transmission phase is independent of temperature. Depending on the mesoscopic parameters of the adjacent levels (such as relative sign and magnitude of tunneling matrix elements), the stationary points are shifted to or repelled by the neighboring level.