Collisional interferometry of levitons in quantum Hall edge channels at ν=2
Artikel i vetenskaplig tidskrift, 2020

We consider a Hong-Ou-Mandel interferometer for Lorentzian voltage pulses applied to quantum Hall edge channels at filling factor ν=2. Due to interedge interactions, the injected electronic wave packets fractionalize before partitioning at a quantum point contact. Remarkably enough, differently from what was theoretically predicted and experimentally observed by using other injection techniques, we demonstrate that when the injection occurs through time-dependent voltage pulses (arbitrarily shaped), the Hong-Ou-Mandel noise signal always vanishes for a symmetric device and that a mismatch in the distances between the injectors and the point of collision is needed to reduce the visibility of the dip. We also show that by properly tuning these distances or by applying different voltages on the two edge channels in each arm of the interferometer, it is possible to estimate the intensity of the interedge interaction. Lorentzian-type voltage pulses are chosen because of their experimental relevance.

quantum transport

electron optics

Shot noise

Författare

Giacomo Rebora

SPIN CNR Institute - Salerno

Università degli Studi di Genova

Matteo Acciai

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

Università degli Studi di Genova

Dario Ferraro

SPIN CNR Institute - Salerno

Università degli Studi di Genova

Maura Sassetti

Università degli Studi di Genova

SPIN CNR Institute - Salerno

Physical Review B

24699950 (ISSN) 24699969 (eISSN)

Vol. 101 24 245310

Ämneskategorier

Atom- och molekylfysik och optik

Annan fysik

Den kondenserade materiens fysik

DOI

10.1103/PhysRevB.101.245310

Mer information

Senast uppdaterat

2020-09-03