Suppression of Visibility in a Two-Electron Mach-Zehnder Interferometer

TL;DR

This paper studies how two-electron interactions and entanglement affect the visibility of interference patterns in a Mach-Zehnder interferometer, revealing effects akin to dephasing without changing the single-electron current.

Contribution

It demonstrates how electron distinguishability and entanglement influence interference visibility in a two-electron interferometer, highlighting phenomena similar to dephasing.

Findings

Partial distinguishability suppresses interference visibility.

Entanglement can mimic dephasing effects.

Single-electron current remains unchanged.

Abstract

We investigate the suppression of the visibility of Aharonov-Bohm oscillations in a two-electron Mach-Zehnder interferometer that leaves the single-electron current unchanged. In the case when the sources emit either spin-polarized or entangled electrons, partial distinguishability of electrons (coming from two different sources) suppresses the visibility. Two-particle entanglement may produce behavior similar to "dephasing" of two-particle interferometry.