Transmission phase of an isolated Coulomb blockade resonance

Weidenmüller, H.A.

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Transmission phase of an isolated Coulomb blockade resonance

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Weidenmüller, H.A.
Prof. Hans A. Weidenmüller, Emeriti, MPI for Nuclear Physics, Max Planck Society;

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Weidenmüller, H. (2002). Transmission phase of an isolated Coulomb blockade resonance. Physical Review B (Condensed Matter and Materials Physics), 65: 245322, pp. 1-6.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0011-84E5-B

Abstract

In two recent papers, O. Entin-Wohlman et al. [cond-mat/0109328 (unpublished) and (private communication)] studied the question: "Which physical information is carried by the transmission phase through a quantum dot?" In the present paper, this question is answered for an islolated Coulomb blockade resonance and within a theoretical model which is more closely patterned after the geometry of the actual experiment by Schuster et al. [Nature 385, 417 (1997)] than is the model of O. Entin-Wohlman et al. We conclude that whenever the number of leads coupled to the Aharanov-Bohm interferometer is larger than two, and the total number of channels is sufficiently large, the transmission phase does reflect the Breit-Wigner behavior of the resonance phase shift.