Hong-Ou-Mandel characterization of multiply charged Levitons

Dario Ferraro (1) , Flavio Ronetti (2, 3, 4, 5) , Luca Vannucci (3, 4) , Matteo Acciai (3, 4, 2, 5) , Jérôme Rech (2, 5) , Thibaut Jockheere (2, 5) , Thierry Martin (2, 5) , Maura Sassetti (3, 4)

1 Departement de Physique Théorique [Genève]
2 CPT - Centre de Physique Théorique - UMR 7332
3 UniGe - Università degli studi di Genova = University of Genoa
4 CNR SPIN
5 CPT - E6 Nanophysique

We review and develop recent results regarding Leviton excitations generated in topological states of matter - such as integer and fractional quantum Hall edge channels - and carrying a charge multiple of the electronic one. The peculiar features associated to these clean and robust emerging excitations can be detected through current correlation measurements. In particular, relevant information can be extracted from the noise signal in generalized Hong-Ou-Mandel experiments, where Levitons with different charges collide against each other at a quantum point contact. We describe this quantity both in the framework of the photo-assisted noise formalism and in terms of a very interesting and transparent picture based on wave-packet overlap.

Domaines: Systèmes mésoscopiques et effet Hall quantique [cond-mat.mes-hall]

Dario Ferraro, Flavio Ronetti, Luca Vannucci, Matteo Acciai, Jérôme Rech, et al.. Hong-Ou-Mandel characterization of multiply charged Levitons. The European Physical Journal. Special Topics, 2018, 227 (12), pp.1345-1359. ⟨10.1140/epjst/e2018-800074-1⟩. ⟨hal-02049482⟩