M. Carrega, D. Ferraro, A. Braggio, N. Magnoli, M. Sassetti
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.
View original:
http://arxiv.org/abs/1201.5782
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