Interplay of mesoscopic and Kondo effects for transmission amplitude of few-level quantum dots

Abstract

The magnitude and phase of the transmission amplitude of a multi-level 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 (like relative sign and magnitude of tunneling matrix elements), the stationary points are shifted to or repelled by the neighboring level.

10 pages, 4 figures

References in corpus (9)

• The numerical renormalization group method for quantum impurity systems
• Real-time dynamics in Quantum Impurity Systems: A Time-dependent Numerical Renormalization Group Approach
• Sum-rule Conserving Spectral Functions from the Numerical Renormalization Group
• A Numerical Renormalization Group approach to Green's Functions for Quantum Impurity Models
• Crossover from mesoscopic to universal phase for electron transmission in quantum dots
• Mesoscopic to universal crossover of transmission phase of multi-level quantum dots
• Transmission through Quantum Dots: Focus on Phase Lapses
• Transmission phase of a singly occupied quantum dot in the Kondo regime
• Phase lapses in transmission through interacting two-level quantum dots

Cited by in corpus (10)

• Quantum Interference in Off-Resonant Transport through Single Molecules
• Transmission Phase in the Kondo Regime Revealed in a Two-Path Interferometer
• Kondo effects in a triangular triple quantum dot with lower symmetries
• Electron phase shift at the zero-bias anomaly of quantum point contacts
• Quantum criticality and non-Fermi-liquid behavior in a two-level two-lead quantum dot
• Transmission phase shifts of Kondo impurities
• Low-temperature behavior of transmission phase shift across a Kondo correlated quantum dot
• Fano-Kondo resonance versus Kondo plateau in an Aharonov-Bohm ring with an embedded quantum dot
• Exchange and correlation effects in the transmission phase through a few-electron quantum dot
• Mesoscopic phase behavior in a quantum dot around crossover between single-level and multilevel transport regimes