1995/09/18 by M. Büttiker, Μ. Büttiker, Charles Stafford +1 · 3 citations
Physics and Astronomy · #Quantum and electron transport phenomena #Quantum optics and atomic interactions #Semiconductor Quantum Structures and Devices #cond-mat
paper · pdf · doi:10.1103/physrevlett.76.495
published as Phys. Rev. Lett. 76, 495 (1996) · 4 pages, REVTEX 3.0, 2 postscript figures
arxiv created 1995/09/18 · openalex publication_date 1996/01/15 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The transfer of charge between different regions of a phase-coherent mesoscopic sample is investigated. Charge transfer from a side branch quantum dot into a ring changes the persistent current through a sequence of plateaus of diamagnetic and paramagnetic states. In contrast, a quantum dot embedded in a ring exhibits sharp resonances in the persistent current, whose sign is independent of the number of electrons in the dot if the total number of electrons in the system is even. It is shown that such a mesoscopic system can be polarized appreciably not only by the application of an external voltage but also via an Aharonov-Bohm flux.