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Fractional quantum Hall quasiparticles are famous for having fractionalelectric charge. Recent experiments report that the quasiparticles' effectiveelectric charge determined through tunneling current noise measurements candepend on the system parameters such as temperature or bias voltage. Severalworks proposed to understand this as a signature for edge theory propertieschanging with energy scale. I consider two of such experiments and show that inone of them the apparent dependence of the electric charge on a systemparameter is likely to be an artefact of experimental data analysis.Conversely, in the second experiment the dependence cannot be explained in sucha way.

Tunneling current noise in the fractional quantum Hall effect: when the effective charge is not what it appears to be