Fractional charges on an integer quantum Hall edge
  We propose ways to create and detect fractionally charged excitations in \emph{integer} quantum Hall edge states. The charge fractionalization occurs due to the Coulomb interaction between electrons propagating on different edge channels. The fractional charge of the soliton-like collective excitations can be observed in time resolved or frequency dependent shot noise measurements. 
E. Berg, Y. Oreg, E.-A. Kim and F. von Oppen