Coherence of Single Electron Sources from Mach-Zehnder Interferometry
  A new type of electron sources has emerged which permits to inject particles in a controllable manner, one at a time, into an electronic circuit. Such single electron sources make it possible to fully exploit the particles' quantum nature. We determine the single-particle coherence length from the decay of the Aharonov-Bohm oscillations as a function of the imbalance of a Mach-Zehnder interferometer connected to a single electron source. The single-particle coherence length is of particular importance as it is an intrinsic property of the source in contrast to the dephasing length. 
G\'eraldine Haack, Michael Moskalets, Janine Splettstoesser and Markus   B\"uttiker
cond-mat.mes-hall quant-ph