Spectral noise for edge states at filling factor $ν=5/2$

Details Spectral noise for edge states at filling factor $ν=5/2$ Spectral noise for edge states at filling factor $ν=5/2$

2012-01-27

arxiv.org/abs/1201.5782v1

New J. Phys. 14, 023017 (2012)

Physics

Condensed Matter

Strongly Correlated Electrons

14 pages, 4 figures. Submitted to New Journal of Phyiscs

Scientific paper

We present a detailed analysis of finite frequency noise for the $\nu=5/2$ fractional quantum Hall state in a quantum point contact geometry. The results are obtained within the Pfaffian and anti-Pfaffian models. We show that the behaviour of the coloured noise allows unambigously to discriminate among tunneling excitations with different charges. Optimal values of the external bias are found in order to emphasize the visibility of the noise peak associated with the tunneling of a 2-agglomerate, namely an excitation with charge double of the fundamental one. These correspond to the regime in which the bias is larger than the neutral modes cut-off frequency. The dependence on the temperature is also investigated in order to discriminate between the considered models.

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