Signatures of Indistinguishability in Bosonic Many-Body Dynamics

Tobias Brünner, Gabriel Dufour, Alberto Rodríguez, and Andreas Buchleitner
Phys. Rev. Lett. 120, 210401 – Published 22 May 2018
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Abstract

The dynamics of bosons in generic multimode systems, such as Bose-Hubbard models, are not only determined by interactions among the particles, but also by their mutual indistinguishability manifested in many-particle interference. We introduce a measure of indistinguishability for Fock states of bosons whose mutual distinguishability is controlled by an internal degree of freedom. We demonstrate how this measure emerges both in the noninteracting and interacting evolution of observables. In particular, we find an unambiguous relationship between our measure and the variance of single-particle observables in the noninteracting limit. A nonvanishing interaction leads to a hierarchy of interaction-induced interference processes, such that even the expectation value of single-particle observables is influenced by the degree of indistinguishability.

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  • Received 19 October 2017

DOI:https://doi.org/10.1103/PhysRevLett.120.210401

© 2018 American Physical Society

Physics Subject Headings (PhySH)

General Physics

Authors & Affiliations

Tobias Brünner1, Gabriel Dufour1,2, Alberto Rodríguez1, and Andreas Buchleitner1,*

  • 1Physikalisches Institut, Albert-Ludwigs-Universität-Freiburg, Hermann-Herder-Straße 3, D-79104 Freiburg, Germany
  • 2Freiburg Institute for Advanced Studies, Albert-Ludwigs-Universität-Freiburg, Albertstraße 19, D-79104 Freiburg, Germany

  • *a.buchleitner@physik.uni-freiburg.de

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Issue

Vol. 120, Iss. 21 — 25 May 2018

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