Many-body interference, partial distinguishability and entanglement

Abstract: Dis-entangling many-body interference in complex quantum systems is central for an improved understanding and control of their dynamics. Many-body interference, in the involved constituents’ dynamical degrees of freedom, is controlled by their mutual (in)distinguishability. This, in turn, can be tuned by addressing suitable “labeling” degrees of freedom. Based on this idea, we develop a comprehensive framework to study partial distinguishability and connect it to correlations within the many-body system. Through a systematic analysis of coherence in the dynamical modes, limited by correlations between dynamical and labeling degrees of freedom, we define a hierarchy of indistinguishability measures. These allow us to identify different orders of many-body interference (given by the number of particles involved) contributing to the generic non-interacting dynamics. By assessing robust features of the resulting interference patterns in randomized correlation measurements, we are able to uncover the coherence structure of a given input state. This equally allows for a characterization of entanglement between dynamical and labeling degrees of freedom, as well as for a quantification of the degree of partial distinguishability in many-body systems

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch
• Notes: Universität Freiburg, Masterarbeit, 2019

Contributors, Places and Time

• Event: Veröffentlichung
• (where): Freiburg
• (who): Universität
• (when): 2020
• Creator: Brunner, Eric
• Contributor: Dufour, Gabriel ; Buchleitner, Andreas

Further information

• DOI: 10.6094/UNIFR/166467
• URN: urn:nbn:de:bsz:25-freidok-1664671
• Rights: Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 25.03.2025, 1:53 PM CET