Measuring which-path information with coupled electronic Mach-Zehnder interferometers
Measuring which-path information with coupled electronic Mach-Zehnder interferometers
We theoretically investigate a generalized "which-path" measurement on an electronic Mach-Zehnder Interferometer (MZI) implemented via Coulomb coupling to a second electronic MZI acting as a detector. The use of contextual values, or generalized eigenvalues, enables the precise construction of which-path operator averages that are valid for any measurement strength from …