Negative Excess Shot Noise by Anyon Braiding

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Anyonic fractional charges e* have been detected by autocorrelation shot noise at a quantum point contact (QPC) between two fractional quantum Hall edges. We find that the autocorrelation noise can also show a fmgerprint of Abelian anyonic fractional statistics. We predict the noise of the electrical tunneling current I at the QPC of the fractional-charge detection setup, when anyons are dilutely injected, from an additional edge biased by a voltage, to the setup in equilibrium. At large voltages, the nonequilibrium noise is reduced below the thermal equilibrium noise by the value 2e*I. This negative excess noise is opposite to the positive excess noise 2e*I of the conventional fractional-charge detection and also to the usual positive autocorrelation noises of electrical currents. This is a signature of Abelian fractional statistics, resulting from the effective braiding of an anyon thermally excited at the QPC around another anyon injected from the additional edge.
Publisher
AMER PHYSICAL SOC
Issue Date
2019-07
Language
English
Article Type
Article
Citation

PHYSICAL REVIEW LETTERS, v.123, no.1, pp.016803

ISSN
0031-9007
DOI
10.1103/PhysRevLett.123.016803
URI
http://hdl.handle.net/10203/263731
Appears in Collection
PH-Journal Papers(저널논문)
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