Multi-particle interference in an electronic mach-zehnder interferometer

Janne Kotilahti, Pablo Burset*, Michael Moskalets, Christian Flindt

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

The development of dynamic single-electron sources has made it possible to observe and manipulate the quantum properties of individual charge carriers in mesoscopic circuits. Here, we investigate multi-particle effects in an electronic Mach-Zehnder interferometer driven by a series of voltage pulses. To this end, we employ a Floquet scattering formalism to evaluate the interference current and the visibility in the outputs of the interferometer. An injected multi-particle state can be described by its first-order correlation function, which we decompose into a sum of elementary correlation functions that each represent a single particle. Each particle in the pulse contributes independently to the interference current, while the visibility (given by the maximal interference current) exhibits a Fraunhofer-like diffraction pattern caused by the multi-particle interference between different particles in the pulse. For a sequence of multi-particle pulses, the visibility resembles the diffraction pattern from a grid, with the role of the grid and the spacing between the slits being played by the pulses and the time delay between them. Our findings may be observed in future experiments by injecting multi-particle pulses into a Mach-Zehnder interferometer.

Original languageEnglish
Article number736
Number of pages19
JournalEntropy
Volume23
Issue number6
DOIs
Publication statusPublished - Jun 2021
MoE publication typeA1 Journal article-refereed

Keywords

  • Electron quantum optics
  • Floquet scattering theory
  • Levitons
  • Mach-zehnder interferometer
  • Single-electron sources
  • Time-dependent currents

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