Exciting half-integer charges in a quantum point contact

Details Exciting half-integer charges in a quantum point contact Exciting half-integer charges in a quantum point contact

2006-12-31

arxiv.org/abs/cond-mat/0701017v1

Phys. Rev. Let. 99 Art. No. 096802 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 6 figures

Scientific paper

10.1103/PhysRevLett.99.096802

We study a voltage-driven quantum point contact (QPC) strongly coupled to a
qubit. We predict pronounced observable features in the QPC current that can be
interpreted in terms of half-integer charge transfers. Our analysis is based on
the Keldysh generating functional approach and contains general results, valid
for all coherent conductors.

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