Influence of channel mixing in fermionic Hong-Ou-Mandel experiments

The authors consider a Hong-Ou-Mandel (HOM) interferometer in the integer quantum Hall effect, where electronic states generated by two ac-driven ohmic contacts collide at a quantum point contact. For perfectly synchronized sources, a full suppression of the output noise power is expected due to the antibunching effect of fermionic particles. This paper shows that the noise suppression is not complete when mixing between edge channels occurs, thus representing an important mechanism for the interpretation of fermionic HOM experiments.