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Coherence of single-electron sources from Mach-Zehnder interferometry

2011; American Physical Society; Volume: 84; Issue: 8 Linguagem: Inglês

10.1103/physrevb.84.081303

1550-235X

Géraldine Haack, Michael Moskalets, Janine Splettstoesser, Μ. Büttiker,

Mechanical and Optical Resonators

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.