Hong-Ou-Mandel interferometry of fractional excitations as a probe of interactions in integer quantum Hall edge channels.

Acciai M., Carrega M., Rech J., Jonckheere T., Martin T., Sassetti M.

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II - Fisica della materia
Aula 32B-2 - Giovedì 20 h 09:00 - 13:00
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We consider the injection of electronic wavepackets by means of a time-dependent voltage applied to the ballistic edge channels of the integer quantum Hall effect. Due to electron-electron interactions, the injected pulse creates fractional excitations in the system. We calculate their non-equilibrium momentum distribution, which carries a clear signature of the minimal excitations known as Levitons. We finally calculate the zero frequency noise due to the partitioning of fractional excitations at a quantum point contact and show how a directly related quantity can be used as a probe of electron-electron interactions.

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