Quantum Hall effect, chiral Luttinger liquids and fractional charges

Roche, P.; Rodríguez, Víctor Manuel Nieto; Glattli, Christian

doi:10.1016/s1631-0705(02)01375-0

Cited by 3 publications

(1 citation statement)

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“…This unfortunately does not seem so realistic due to the complicated analytics which describe the dependence on both the temperature and the DC voltage of the backscattering current [25]. In practice, a quantitative agreement between the backscattering current predicted by theory and experiments seems hard to achieve [26,27] as it relies on identifying a power-law behavior, which not only requires varying the voltage over several decades but is also easily blurred by non-universal effects.…”

Section: Introductionmentioning

confidence: 99%

Photo-assisted current in the fractional quantum Hall effect as a probe of the quasiparticle operator scaling dimension

Bertin-Johannet,

Raymond,

Rech

et al. 2023

Preprint

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We study photo-assisted transport for the edge states of a two dimensional electron gas in the fractional quantum Hall regime, pinched by a single quantum point contact. We provide a general expression of the photo-assisted current using a Keldysh-Floquet approach, when the AC drive is applied either directly to the edge states, or when it modulates the tunneling amplitude at the quantum point contact. Strikingly, for a simple cosine modulation of the tunneling amplitude, the phase shift of the second harmonic of the photoassisted current is directly related to the scaling dimension of the quasiparticle operators describing the fractional excitations. As the scaling dimension is intimately related to the statistics, our proposal of a gate modulation of the backscattered current provides a diagnosis of the statistics of Laughlin quasiparticles using a simple quantum point contact geometry.

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Section: Introductionmentioning

confidence: 99%