Electronic implementations of Interaction-Free Measurements

Understand

Three different implementations of interaction-free measurements (IFMs) in solid-state nanodevices are discussed.

• The first one is based on a series of concatenated Mach-Zehnder interferometers, in analogy to optical-IFM setups.
• The second one consists of a single interferometer and concatenation is achieved in the time domain making use of a quantized electron emitter.
• The third implementation consists of an asymmetric Aharonov-Bohm ring.